Display device and method of driving the same in two modes

ABSTRACT

A display device includes a display panel and a touch panel. The touch panel calculates coordinate information of an input position by an electrostatic capacitive method in a first mode and calculates the coordinate information of the input position by an electromagnetic induction method in a second mode. The touch panel includes scan line groups and source line groups, which are operated as touch electrodes or touch coils on the basis of the operating mode thereof. In addition, the touch panel includes touch electrodes and touch coils, which are individually operated on the basis of the operating mode thereof.

CROSS REFERENCE TO RELATED APPLICATIONS

This U.S. non-provisional patent application is a Divisional of U.S.patent application Ser. No. 15/179,315, filed on Jun. 10, 2016, which isa Divisional of U.S. patent Ser. No. 14/024,241, filed on Sep. 11, 2013,issued as U.S. Pat. No. 9,389,737, and claims priority from and thebenefit of U.S. Provisional Patent Application No. 61/701,100, filed onSep. 14, 2012, Korean Patent Application No. 10-2013-0021423, filed onFeb. 27, 2013, Korean Patent Application No. 10-2013-0021426, filed onFeb. 27, 2013, and Korean Patent Application No. 10-2013-0055845, filedon May 16, 2013, which are hereby incorporated by reference for allpurposes as if fully set forth herein.

BACKGROUND Field

Exemplary embodiments of the present disclosure relate to a displaydevice capable of sensing a touch event and a method of driving thedisplay device.

Discussion of the Background

In general, a touch panel may acquire coordinate information of an inputposition at which a touch event occurs and provides the coordinateinformation to a display panel. The touch panel may be used to replacean input device, such as a keyboard, a mouse, etc.

The display panel displays an image corresponding to the coordinateinformation provided from the touch panel. The touch panel may beseparately manufactured and then attached to the display panel. Thetouch panel may be classified into a resistive film type of touch panel,a capacitive type of touch panel, and an electromagnetic type of touchpanel depending on its operational principle. The display device mayinclude various types of touch panels.

SUMMARY

Exemplary embodiments of the present disclosure provide a display devicehaving a touch panel operated in two modes.

Exemplary embodiments of the present disclosure provide a display devicehaving a touch panel that senses touch events in different waysaccording to areas of the display device where it senses the touchevents.

Exemplary embodiments of the present disclosure provide a method ofdriving the display device, which is capable of reducing a noise thatexerts influences on touch sensitivity.

Additional features of the present disclosure will be set forth in thedescription which follows, and in part will be apparent from thedescription, or may be learned by practice of the disclosed subjectmatter.

Exemplary embodiments of the present disclosure disclose a displaydevice including a display panel, scan line groups, source line groups,a first driver, a second driver, and a touch sensor. The display panelincludes a first display substrate and a second display substrate facingthe first display substrate. Each scan line group includes a first scanline sub-group, a second scan line sub-group connected to the first scanline sub-group, and a third scan line sub-group disposed between thefirst scan line sub-group and the second scan line sub-group. Eachsource line group includes a first source line sub-group, a secondsource line sub-group connected to the first source line sub-group, anda third source line sub-group disposed between the first source linesub-group and the second source line sub-group. The first driver isconfigured to provide first scan signals to the scan line groups in afirst mode and to provide second scan signals to the scan line groups ina second mode. A magnetic field is induced by a current path formed bythe first scan line sub-group and the second scan line sub-group. Thesecond driver is configured to provide first sensing signalscorresponding to a variation in a capacitance from the source linegroups in the first mode, and to provide second sensing signalsaccording to a resonant frequency associated with an input device. Thesecond sensing signals are provided from the source line groups in thesecond mode. The touch sensor is configured to receive the first sensingsignals and the second sensing signals and to determine coordinateinformation of an input position based on the first sensing signals andthe second sensing signals.

Exemplary embodiments of the present disclosure disclose a displaydevice including a display panel, scan line groups, source line groups,a first driver, a second driver, and a touch sensor. The display panelincludes a first display substrate and a second display substrate facingthe first display substrate. Each scan line group includes a first scanline sub-group, a second scan line sub-group, and a third scan linesub-group disposed between the first scan line sub-group and the secondscan line sub-group. Each source line group includes a first source linesub-group, a second source line sub-group, and a third source linesub-group disposed between the first source line sub-group and thesecond source line sub-group. The first driver is configured to providefirst scan signals to the scan line groups in a first mode and toprovide second scan signals to the first scan line sub-group and thesecond scan line sub-group of the scan line groups in a second mode. Amagnetic field is induced by currents flowing through the first scanline sub-group and the second scan line sub-group in opposite directionsto each other. The second driver is configured to provide a firstsensing signal corresponding to a variation in a capacitance from thesource line groups in the first mode, and to provide, from the sourceline groups in the second mode, a second sensing signal according to aresonant frequency associated with an input device. The touch sensor isconfigured to receive the first sensing signal and the second sensingsignal, and to determine coordinate information of an input positionbased on the first sensing signal and the second sensing signal.

Exemplary embodiments of the present disclosure disclose a displaydevice including a display panel and a touch panel. The display panelincludes a first display substrate and a second display substrate facingthe first substrate. The display panel is divided into a blocking areaand a plurality of transmitting areas. The touch panel includes aplurality of first touch electrodes, a plurality of second touchelectrodes, a plurality of first touch coils, and a plurality of secondtouch coils. The touch panel includes a first conductive layer and asecond conductive layer insulated from the first conductive layer. Thetouch panel is disposed on one of the first display substrate or thesecond display substrate that is provided with an input surface. Theplurality of first touch electrodes is configured to receive first scansignals. The plurality of second touch electrodes cross the first touchelectrodes and is configured to provide first sensing signals accordingto a variation in capacitance. The plurality of first touch coilsoverlaps with the blocking area and is configured to receive second scansignals. The plurality of second touch coils overlaps with the blockingarea and crosses the first touch coils. The plurality of second touchcoils is configured to provide second sensing signals according to aresonant frequency associated with an input device. The first conductivelayer includes the first touch electrodes and one of the second touchelectrodes and the first touch coils.

Exemplary embodiments of the present disclosure disclose a displaydevice including a display panel and a touch panel. The display panelincludes a first area, a second area, and a plurality of pixels. Thedisplay panel is configured to provide an image during a frame period.The touch panel includes a first touch part and a second touch part. Thefirst touch part includes first touch coils and second touch coils. Thesecond touch coils are insulated from the first touch coils and crossthe first touch coils. The second touch part includes first touchelectrodes disposed on the first touch part and second touch electrodes.The second touch electrodes are insulated from the first touchelectrodes and cross the first touch electrodes. Corresponding secondscan signals of the second scan signals are applied to the first touchelectrodes disposed in the first area when corresponding first scansignals of the first scan signals are applied to the first touch coilsdisposed in the second area during a first period of the frame period.The second touch coils are configured to provide first sensing signalsaccording to a resonant frequency of an input device. The second touchelectrodes are configured to provide second sensing signals according toa variation in capacitance.

Exemplary embodiments of the present disclosure disclose a method ofdriving a display device comprising a display panel generating an imageduring a frame period and a touch panel comprising input coils, outputcoils, input electrodes, and output electrodes. The method includesactivating pixels disposed in a first area of the display panel during afirst period of the frame period; providing first scan signals to theinput coils disposed in a second area adjacent to the first area;providing second scan signals to the input electrodes disposed in thefirst area of the display panel; and determining coordinate informationof an input position from at least one of first sensing signals providedbased on a resonant frequency of an input device and output from theoutput coils, and a second sensing signal provided based on a variationin capacitance and output from the output electrodes.

Exemplary embodiments of the present disclosure disclose a displaydevice including a display panel and a touch panel. The display panelincludes a plurality of pixels and is configured to provide an imageduring a frame period. The frame period includes a display period and anon-display period. The touch panel includes a first touch part and asecond touch part. The first touch part includes first touch coils andsecond touch coils. The second touch coils are insulated from the firsttouch coils and cross the first touch coils. The second touch partincludes first touch electrodes disposed on the first touch part andsecond touch electrodes. The second touch electrodes are insulated fromthe first touch electrodes and cross the first touch electrodes. Firstscan signals are provided to the first touch coils during the displayperiod, and second scan signals are provided to the first touchelectrodes during the non-display period. The second touch coils areconfigured to provide first sensing signals according to a resonantfrequency of an input device, and the second touch electrodes areconfigured to provide second sensing signals according to a variation incapacitance.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory and areintended to provide further explanation of the disclosed subject matteras claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the disclosed subject matter and are incorporated inand constitute a part of this specification, illustrate exemplaryembodiments of the disclosed subject matter, and together with thedescription serve to explain the principles of the disclosed subjectmatter.

FIG. 1 is a block diagram showing a display device according toexemplary embodiments of the present disclosure.

FIG. 2 is a perspective view showing a display panel shown in FIG. 1according to exemplary embodiments of the present disclosure.

FIG. 3 is a plan view showing a display panel shown in FIG. 2 accordingto exemplary embodiments of the present disclosure.

FIG. 4 is a cross-sectional view taken along a line I-I′ shown in FIG. 2according to exemplary embodiments of the present disclosure.

FIG. 5 is a block diagram showing a touch panel according to exemplaryembodiments of the present disclosure.

FIG. 6 is a view showing a touch panel operated in a first modeaccording to exemplary embodiments of the present disclosure.

FIGS. 7A and 7B are views showing a touch panel operated in a secondmode according to exemplary embodiments of the present disclosure.

FIG. 8 is a timing diagram showing signals generated in the second modeaccording to exemplary embodiments of the present disclosure.

FIG. 9 is a block diagram showing a first driver shown in FIG. 5according to exemplary embodiments of the present disclosure.

FIG. 10 is a circuit diagram showing a switching part shown in FIG. 9according to exemplary embodiments of the present disclosure.

FIG. 11 is a block diagram showing a second driver and a touch sensorshown in FIG. 5 according to exemplary embodiments of the presentdisclosure.

FIG. 12 is a circuit diagram showing a sensing signal output part shownin FIG. 11 according to exemplary embodiments of the present disclosure.

FIG. 13 is a cross-sectional view showing a display panel according toexemplary embodiments of the present disclosure.

FIG. 14 is a cross-sectional view showing a display panel according toexemplary embodiments of the present disclosure.

FIGS. 15A and 15B are plan views showing display panels according toexemplary embodiments of the present disclosure.

FIG. 16 is a block diagram showing a touch panel according to exemplaryembodiments of the present disclosure.

FIG. 17 is a view showing a touch panel operated in a first modeaccording to exemplary embodiments of the present disclosure.

FIGS. 18A and 18B are views showing touch panels operated in a secondmode according to exemplary embodiments of the present disclosure.

FIG. 19 is a bock diagram showing a second scan driver according toexemplary embodiments of the present disclosure.

FIG. 20 is a block diagram showing a second source driver according toexemplary embodiments of the present disclosure.

FIG. 21 is a block diagram showing a display device according toexemplary embodiments of the present disclosure.

FIG. 22 is a partial perspective view showing a display panel and atouch panel shown in FIG. 21 according to exemplary embodiments of thepresent disclosure.

FIGS. 23A and 23B are cross-sectional views taken along a line I-I′shown in FIG. 22 according to exemplary embodiments of the presentdisclosure.

FIG. 24A is a plan view showing a pixel of a display panel according toexemplary embodiments of the present disclosure.

FIG. 24B is a cross-sectional view taken along a line II-If shown inFIG. 24A according to exemplary embodiments of the present disclosure.

FIG. 25 is a plan view showing a touch panel according to exemplaryembodiments of the present disclosure.

FIG. 26A is a plan view showing first touch electrodes and first touchcoils shown in FIG. 25 according to exemplary embodiments of the presentdisclosure.

FIG. 26B is a plan view showing second touch electrodes and second touchcoils shown in FIG. 25 according to exemplary embodiments of the presentdisclosure.

FIG. 27A is a plan view showing first touch electrodes and first touchcoils shown in FIG. 25 according to exemplary embodiments of the presentdisclosure.

FIG. 27B is a plan view showing second touch electrodes and second touchcoils shown in FIG. 25 according to exemplary embodiments of the presentdisclosure.

FIG. 28A is a block diagram showing a touch panel driver according toexemplary embodiments of the present disclosure.

FIG. 28B is a block diagram showing a touch sensor according toexemplary embodiments of the present disclosure.

FIG. 29A is a block diagram showing a touch panel driver according toexemplary embodiments of the present disclosure.

FIG. 29B is a block diagram showing a touch sensor according toexemplary embodiments of the present disclosure.

FIG. 30 is a partially enlarged plan view showing a portion of the touchpanel shown in FIG. 25 according to exemplary embodiments of the presentdisclosure.

FIGS. 31A and 31B are enlarged plan views showing a portion “AA” shownin FIG. 30 according to exemplary embodiments of the present disclosure.

FIG. 32 is a cross-sectional view taken along a line of FIG. 10according to exemplary embodiments of the present disclosure.

FIG. 33 is a partially enlarged plan view showing a portion “BB” shownin FIG. 30 according to exemplary embodiments of the present disclosure.

FIG. 34 is a cross-sectional view taken along a line IV-IV′ shown inFIG. 33 according to exemplary embodiments of the present disclosure.

FIG. 35 is a partially enlarged plan view showing a portion “CC” shownin FIG. 30 according to exemplary embodiments of the present disclosure.

FIG. 36 is a cross-sectional view taken along a line V-V shown in FIG.35 according to exemplary embodiments of the present disclosure.

FIG. 37 is a cross-sectional view taken along a line shown in FIG. 30according to exemplary embodiments of the present disclosure.

FIG. 38 is a partially enlarged plan view showing a portion “BB” shownin FIG. 30 according to exemplary embodiments of the present disclosure.

FIG. 39 is a cross-sectional view taken along a line IV-IV′ shown inFIG. 38 according to exemplary embodiments of the present disclosure.

FIG. 40 is a partially enlarged plan view showing a portion “CC” shownin FIG. 30 according to exemplary embodiments of the present disclosure.

FIG. 41 is a cross-sectional view taken along a line V-V shown in FIG.40 according to exemplary embodiments of the present disclosure.

FIG. 42 is a partially enlarged plan view showing a portion of the touchpanel shown in FIG. 25 according to exemplary embodiments of the presentdisclosure.

FIG. 43 is a cross-sectional view taken along a line shown in FIG. 42according to exemplary embodiments of the present disclosure.

FIG. 44 is a partially enlarged plan view showing a portion “DD” shownin FIG. 42 according to exemplary embodiments of the present disclosure.

FIGS. 45A to 45C are enlarged plan views showing touch panels accordingto exemplary embodiments of the present disclosure.

FIG. 46A is a plan view showing first touch electrodes and first touchcoils according to exemplary embodiments of the present disclosure.

FIG. 46B is a plan view showing second touch electrodes and second touchcoils according to exemplary embodiments of the present disclosure.

FIG. 47A is a plan view showing first touch electrodes and first touchcoils according to exemplary embodiments of the present disclosure.

FIG. 47B is a plan view showing second touch electrodes and second touchcoils according to exemplary embodiments of the present disclosure.

FIG. 48 is a plan view showing a touch panel according to exemplaryembodiments of the present disclosure.

FIGS. 49A and 49B are cross-sectional views showing a touch panelaccording to exemplary embodiments of the present disclosure.

FIGS. 50A and 50B are cross-sectional views showing a touch panelaccording to exemplary embodiments of the present disclosure.

FIG. 51 is a cross-sectional view showing a display device according toexemplary embodiments of the present disclosure.

FIGS. 52A, 52B, 52C, 52D, and 52E are cross-sectional views showing atouch panel according to exemplary embodiments of the presentdisclosure.

FIG. 53 is a cross-sectional view showing a display device according toexemplary embodiments of the present disclosure.

FIG. 54 is a cross-sectional view showing a display device according toexemplary embodiments of the present disclosure.

FIG. 55 is a block diagram showing a display device according toexemplary embodiments of the present disclosure.

FIG. 56 is a partial perspective view showing the display device shownin FIG. 55 according to exemplary embodiments of the present disclosure.

FIG. 57 is a cross-sectional view taken along a line I-I′ shown in FIG.56 according to exemplary embodiments of the present disclosure.

FIG. 58 is a plan view showing a touch panel according to exemplaryembodiments of the present disclosure.

FIG. 59A is a plan view showing a first touch part shown in FIG. 58according to exemplary embodiments of the present disclosure.

FIG. 59B is a plan view showing a second touch part shown in FIG. 58according to exemplary embodiments of the present disclosure.

FIG. 60 is a timing diagram showing signals applied to a display deviceaccording to exemplary embodiments of the present disclosure.

FIG. 61A is a block diagram showing a touch panel driver according toexemplary embodiments of the present disclosure.

FIG. 61B is a block diagram showing a touch sensor according toexemplary embodiments of the present disclosure.

FIGS. 62A and 62B are timing diagrams showing scan signals according toexemplary embodiments of the present disclosure.

FIG. 63 is an equivalent diagram showing a path through which a noise isgenerated, which exerts an influence on a second touch sensor, accordingto exemplary embodiments of the present disclosure.

FIGS. 64A and 64B are graphs showing a relation between the noise andthe detection signal according to exemplary embodiments of the presentdisclosure.

FIG. 65 is an equivalent diagram showing a path through which a noise isremoved in a display device according to exemplary embodiments of thepresent disclosure.

FIG. 66 is a timing diagram showing signals applied to a display deviceaccording to exemplary embodiments of the present disclosure.

FIGS. 67, 68, and 69 are cross-sectional views showing display devicesaccording to exemplary embodiments of the present disclosure.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

The disclosed subject matter is described more fully hereinafter withreference to the accompanying drawings, in which exemplary embodimentsof the disclosed subject matter are shown. This disclosed subject mattermay, however, be embodied in many different forms and should not beconstrued as limited to the exemplary embodiments set forth herein.Rather, these exemplary embodiments are provided so that this disclosureis thorough, and will fully convey the scope of the disclosed subjectmatter to those skilled in the art. In the drawings, the size andrelative sizes of layers and regions may be exaggerated for clarity.Like reference numerals in the drawings denote like elements.

It will be understood that when an element or layer is referred to asbeing “on”, “connected to”, or “coupled to” another element or layer, itcan be directly on, connected, or coupled to the other element or layeror intervening elements or layers may be present. In contrast, when anelement is referred to as being “directly on,” “directly connected to”,or “directly coupled to” another element or layer, there are nointervening elements or layers present. As used herein, the term“and/or” includes any and all combinations of one or more of theassociated listed items. It may also be understood that for the purposesof this disclosure, “at least one of X, Y, and Z” can be construed as Xonly, Y only, Z only, or any combination of two or more items X, Y, andZ (e.g., XYZ, XYY, YZ, ZZ).

It will be understood that, although the terms first, second, etc. maybe used herein to describe various elements, components, regions,layers, and/or sections, these elements, components, regions, layers,and/or sections should not be limited by these terms. These terms areonly used to distinguish one element, component, region, layer, orsection from another region, layer, or section. Thus, a first element,component, region, layer, or section discussed below could be termed asecond element, component, region, layer, or section without departingfrom the teachings of the present disclosure.

Spatially relative terms, such as “beneath”, “below”, “lower”, “above”,“upper”, and the like, may be used herein for ease of description todescribe one element or feature's relationship to another element(s) orfeature(s) as illustrated in the figures. It will be understood that thespatially relative terms are intended to encompass differentorientations of the device in use or operation in addition to theorientation depicted in the figures. For example, if the device in thefigures is turned over, elements described as “below” or “beneath” otherelements or features would then be oriented “above” the other elementsor features. Thus, the exemplary term “below” can encompass both anorientation of above and below. The device may be otherwise oriented(rotated 90 degrees or at other orientations) and the spatially relativedescriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the disclosedsubject matter. As used herein, the singular forms, “a”, “an”, and “the”are intended to include the plural forms as well, unless the contextclearly indicates otherwise. It will be further understood that theterms “includes” and/or “including”, when used in this specification,specify the presence of stated features, integers, steps, operations,elements, and/or components, but do not preclude the presence oraddition of one or more other features, integers, steps, operations,elements, components, and/or groups thereof.

Exemplary embodiments of the disclosed subject matter are describedherein with reference to cross-section illustrations that are schematicillustrations of idealized embodiments (and intermediate structures) ofthe disclosed subject matter. As such, variations from the shapes of theillustrations as a result, for example, of manufacturing techniquesand/or tolerances, are to be expected. Thus, exemplary embodiments ofthe disclosed subject matter should not be construed as limited to theparticular shapes of regions illustrated herein but are to includedeviations in shapes that result, for example, from manufacturing.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this disclosure belongs. It willbe further understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art andwill not be interpreted in an idealized or overly formal sense unlessexpressly so defined herein.

Hereinafter, the exemplary embodiments of present disclosure will beexplained in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a display device according toexemplary embodiments of the present disclosure. FIG. 2 is a perspectiveview showing a display panel shown in FIG. 1. FIG. 3 is a plan viewshowing a display panel shown in FIG. 2. FIG. 4 is a cross-sectionalview taken along a line I-I′ shown in FIG. 2.

The display device includes a display panel LDP, a signal controller100, a gate driver 200, a data driver 300, and a touch panel. The touchpanel includes a plurality of scan lines TL1 to TLi (“i” is any wholenumber greater than 1), a plurality of source lines RL1 to RLj (“j” isany whole number greater than 1), a first driver 400, a second driver500, and a touch sensor 600. The signal controller 100, the gate driver200, and the data driver 300 control the display panel LDP to generatean image. The first driver 400 and the second driver 500 control thetouch panel, and the touch sensor 600 calculates coordinate informationof input positions.

Various display panels, such as a liquid crystal display panel, anorganic light emitting display panel, an electrophoretic display panel,an electrowetting display panel, etc., may be used as the display panelLDP. According to exemplary embodiments of the present disclosure, insome cases, the display panel LDP may be a liquid crystal display panel,as described below.

A liquid crystal display (LCD) may also include a backlight unit (notshown) to supply a light to the liquid crystal display panel and a pairof polarizing plates (not shown). In addition, the liquid crystaldisplay panel may include a vertical alignment mode panel, a patternedvertical alignment mode panel, an in-plane switching mode panel, afringe-field switching mode panel, or a plane to line switching modepanel.

The display panel LDP includes a first display substrate DS1 and asecond display substrate DS2, which are disposed to be spaced apart fromeach other. One of the first display substrate DS1 and the seconddisplay substrate DS2, which is disposed at a relatively upper position,provides an input device with an input surface.

The display panel LDP includes a plurality of gate lines GL1 to GLn (“n”is any whole number greater than 1), a plurality of data lines DL1 toDLm (“m” is any whole number greater than 1), and a plurality of pixelsPX11 to PXnm. Both of the gate lines GL1 to GLn and the data lines DL1to DLm are disposed on either the first display substrate DS1 or on thesecond display substrate DS2. In FIG. 1, the gate lines GL1 to GLn andthe data lines DL1 to DLm are disposed on the first display substrateDS1.

The gate lines GL1 to GLn are extended in a first direction DR1 andarranged in a second direction DR2 substantially perpendicular to thefirst direction DR1. The data lines DL1 to DLm are extended in thesecond direction DR2 and arranged in the first direction DR1. The datalines DL1 to DLm are insulated from the gate lines GL1 to GLn whilecrossing the gate lines GL1 to GLn. The gate lines GL1 to GLn areconnected to the gate driver 200, and the data lines DL1 to DLm areconnected to the data driver 300.

The pixels PX11 to PXnm are arranged in a matrix form. The pixels PX11to PXnm are arranged in pixel areas PXA11 to PXAnm, respectively. Eachof the pixels PX11 to PXnm is connected to a corresponding gate line ofthe gate lines GL1 to GLn and a corresponding data line of the datalines DL1 to DLm.

The scan lines TL1 to TLi and the source lines RL1 to RLj are disposedon the substrate that provides the input surface. The scan lines TL1 toTLi and the source lines RL1 to RLj may be disposed on first displaysubstrate DS1 or the second display substrate DS2. FIG. 3 shows ninescan lines TL1 to TL9 and ten source lines RL1 to RL10, and FIG. 4 showsa few scan lines TL of the scan lines TL1 to TLj and one source line RLof the source lines RL1 to RLj.

The scan lines TL1 to TLi are disposed on a layer different from a layeron which the source lines RL1 to RLj are disposed. The scan lines TL1 toTLj are extended in the first direction DR1 and arranged in the seconddirection DR2. The source lines RL1 to RLj are extended in the seconddirection DR2 and arranged in the first direction DR1. The scan linesTL1 to TLi are connected to the first driver 400 and the source linesRL1 to RLj are connected to the second driver 500.

The scan lines TL1 to TLi and the source lines RL1 to RLj are formed ofa transparent conductive material. In addition, the scan lines TL1 toTLi and the source lines RL1 to RLj may be formed of a metal materialhaving a low reflectance.

The gate driver 200 and the data driver 300 may be disposed on the firstdisplay substrate DS1, and the first driver 400 and the second driver500 may be disposed on the second display substrate DS2. The signalcontroller 100 and the touch sensor 600 are disposed on a circuit boardconnected to the display panel LDP.

Hereinafter, arrangements of the display panel LDP, the scan lines TL1to TL9, and the source lines RL1 to RL10 will be described in detailwith reference to FIGS. 2, 3, and 4.

The second display substrate DS2 includes a plurality of transmittingareas TA and a blocking area SA. The blocking area SA surrounds thetransmitting areas TA. The transmitting areas TA transmit lightgenerated by and provided from the backlight unit and the blocking areaSA blocks the light. The transmitting areas TA are arranged in a matrixform. The display device generates an image by combining the lighttransmitting through the transmitting areas TA.

Referring to FIG. 3, the scan lines TL1 to TL9 and the source lines RL1to RL10 are disposed in the blocking area SA. Among the scan lines TL1to TL9, two scan lines adjacent to each other are disposed to be spacedapart from each other while interposing the transmitting areas TAarranged in the second direction DR2. Among the source lines RL1 toRL10, two source lines adjacent to each other are disposed to be spacedapart from each other while interposing the transmitting areas TAarranged in the first direction DR1. The scan lines TL1 to TL9 and thesource lines RL1 to RL10 are disposed to overlap with the blocking areaSA. The scan lines TL1 to TL9 and the source lines RL1 to RL10 are notperceived to a user.

Referring to FIG. 4, the first display substrate DS1 includes a firstbase substrate SUB1, a plurality of insulating layers 10 and 20, and aplurality of conductive layers CE and PE. FIG. 4 shows the plane to lineswitching mode panel, but the structure of the display panel should notbe limited thereto or thereby.

Common electrodes CE are disposed on the first base substrate SUB1. Afirst insulating layer 10 is disposed on the first base substrate SUB1to cover the common electrodes CE. Pixel electrodes PE are disposed onthe first insulating layer 10. A second insulating layer 20 is disposedon the first insulating layer 10 to cover the pixel electrodes PE.

Each of the first and second insulating layers 10 and 20 is configuredto include at least one organic layer and/or at least one inorganiclayer. The gate lines GL1 to GLn (refer to FIG. 1) and the data linesDL1 to DLm (refer to FIG. 1) have not been shown in FIG. 4.

The pixel areas PXA are defined in the first display substrate DS1 andthe pixels PX are disposed on the first display substrate DS1. The pixelareas PXA are overlapped with the transmitting areas TA, respectively.As an example, FIG. 4 shows three pixel areas PXA.

Each of the pixels PX includes a corresponding common electrode of thecommon electrodes CE and a corresponding pixel electrode of the pixelelectrodes PE. In addition, each of the pixels PX further includes athin film transistor connected to a corresponding data line of the datalines DL1 to DLm, a corresponding gate line of the gate lines GL1 toGLn, and a corresponding pixel electrode of the pixel electrodes PE.

The thin film transistor receives a pixel voltage from the pixelelectrode PE. The common electrodes CE receive a common voltage. Thecommon electrodes CE and the pixel electrodes PE form an electric field,and thus orientation arrangements of directors (e.g., liquid crystalmolecules) included in the liquid crystal layer LCL are changed by theelectric field. For example, in some cases, the common electrodes CE andthe pixel electrodes PE form a horizontal electric field, and thusorientation arrangements of the liquid crystal molecules in the liquidcrystal layer LCL are changed by the horizontal electric field.

As shown in FIG. 4, the second display substrate DS2 includes a secondbase substrate SUB2, a black matrix BM, and a plurality of color filtersCF. The black matrix BM includes a plurality of openings BM-OP formedtherethrough. The scan lines TL and the source lines RL are disposed onthe second base substrate SUB2. FIG. 4 shows four scan lines TL and onesource line RL. In FIG. 4, the one source line RL is presented toexplain a layer structure of the second display substrate DS2.Practically, the one source line RL does not be overlapped with theplurality of openings BM-OP, and the one source line RL is overlappedwith black matrix BM.

The black matrix BM is disposed on a lower surface of the second basesubstrate SUB2. The transmitting areas TA are defined by the openingsBM-OP. In addition, the blocking area SA corresponds to an area in whichthe black matrix BM is disposed.

The color filters CF are disposed to overlap with the openings BM-OP,respectively. The color filters CF are respectively inserted into theopenings BM-OP. The color filters CF include color filters havingdifferent colors from each other. For example, a portion of the colorfilters has a red color, another portion of the color filters has agreen color, and the other portion of the color filters has a bluecolor.

The scan lines TL are disposed on the second base substrate SUB2. Thescan lines TL may be directly disposed on the second base substrateSUB2. An insulating layer IL is disposed on the second base substrateSUB2 to cover the scan lines TL. A protection layer PL is disposed onthe insulating layer IL. The insulating layer IL may be, but not limitedto, an adhesive layer. The protection layer PL may be an optical member,e.g., a polarizing plate.

The source line RL is disposed under the second base substrate SUB2. Thesource line RL is overlapped with the black matrix BM. The source lineRL may be directly disposed on a lower surface of the second basesubstrate SUB2. In this case, the black matrix BM covers the source lineRL. In some cases, the positions of the scan lines TL and the sourceline RL may be switched.

Referring to FIG. 1, the signal controller 100 receives input imagesignals RGB and converts the input image signals RGB to image dataR′G′B′ corresponding to an operating mode of the display panel LDP. Inaddition, the signal controller 100 receives various control signals CS,such as a vertical synchronizing signal, a horizontal synchronizingsignal, a main clock signal, a data enable signal, etc., and outputsfirst and second control signals CONT1 and CONT2 and a mode selectionsignal MSS.

The mode selection signal MSS determines the operating mode of the gatedriver 200 and the touch panel. The touch panel may operate in anelectrostatic capacitive mode (hereinafter, referred to as a first mode)or an electromagnetic induction mode (hereinafter, referred to as asecond mode).

The mode selection signal MSS may be generated on the basis of the imagedisplayed in the display panel LDP. The mode selection signal MSS mayhave different levels according to the operating modes. For instance,when the display panel LDP displays a keypad image, the mode selectionsignal MSS is output as a signal to activate the first mode, and whenthe display panel LDP displays a game image, the mode selection signalMSS is output as a signal to activate the second mode. In some cases,the mode selection signal MSS may be input by the user. For instance,the mode selection signal MSS is generated corresponding to aninformation inputted to a keypad by the user. The user may touch a firstmode activating button.

The gate driver 200 applies gate signals to the gate lines GL1 to GLn inresponse to the first control signal CONT1. The first control signalCONT1 includes a vertical start signal to control and start an operationof the gate driver 200, a gate clock signal to determine an outputtiming of a gate voltage, and an output enable signal that controls anON-pulse width of the gate voltage.

The data driver 300 receives the second control signal CONT2 and theimage data R′G′B′. The data driver 300 converts the image data R′G′B′ todata voltages and applies the data voltages to the data lines DL1 toDLm.

The second control signal CONT2 includes a horizontal start signal tocontrol and start an operation of the data driver 300, an invertingsignal to invert a polarity of the data voltages, and an outputindicating signal that controls an output timing of the data voltagesfrom the data driver 300.

The first driver 400 receives the mode selection signal MSS. The firstdriver 400 receives first scan signals TS1 and second scan signals TS2,and applies the first scan signals TS1 or the second scan signals TS2 tothe scan lines TL1 to TLi in response to the mode selection signal MSS.The first driver 400 outputs the first scan signals TS1 in the firstmode and outputs the second scan signals TS2 in the second mode.

The second driver 500 receives the mode selection signal MSS. The seconddriver 500 outputs sensing signals SS1 (hereinafter, referred to asfirst sensing signals) that represent a variation in capacitance of thesource lines RL1 to RLj during the first mode. The second driver 500outputs sensing signals SS2 (hereinafter, referred to as second sensingsignals) according to a resonant frequency of the input device duringthe second mode. The input device may be, but is not limited to, astylus pen with an inductor-capacitor (LC) resonant circuit.

The touch sensor 600 receives the first sensing signals SS1 and thesecond sensing signals SS2. The touch sensor 600 calculates thecoordinate information of an input position based on the first sensingsignals SS1 and the second sensing signals SS2. The input position inthe first mode may be a position on the second display substrate DS2 atwhich a touch of the input device is detected. In addition, the inputposition in the second mode may be a position on the second displaysubstrate DS2 at which a touch or an approach by the input devicedetected.

FIG. 5 is a block diagram showing a touch panel according to exemplaryembodiments of the present disclosure. FIG. 5 shows thirty-six scanlines TL1 to TL36 and thirty-six source lines RL1 to RL36.

Referring to FIG. 5, the thirty-six scan lines TL1 to TL36 are groupedinto four scan line groups TG10, TG20, TG30, and TG40 (hereinafter,referred to first, second, third, and fourth scan line groups,respectively) and the thirty-six source lines RL1 to RL36 are groupedinto four source line groups RG10, RG20, RG30, and RG40 (hereinafter,referred to first, second, third, and fourth source line groups,respectively). Each of the first to fourth scan line groups TG10, TG20,TG30, and TG40 includes a first scan line sub-group TLG1, a second scanline sub-group TLG2, and a third scan line sub-group TLG3. Each of thefirst scan line sub-group TLG1, the second scan line sub-group TLG2, andthe third scan line sub-group TLG3 includes at least one scan line.

The first scan line sub-group TLG1, the second scan line sub-group TLG2,and the third scan line sub-group TLG3 include the same number of scanlines. For example, in FIG. 5, each scan line sub-group includes threescan lines. First ends of the three scan lines are connected to eachother and the second ends of the three scan lines are connected to eachother. It should be understood that various numbers of scan lines may beincluded in each scan line sub-group.

The first scan line sub-group TLG1, the second scan line sub-group TLG2,and the third scan line sub-group TLG3 are arranged in the seconddirection DR2. The third scan line sub-group TLG3 is disposed betweenthe first scan line sub-group TLG1 and the second scan line sub-groupTLG2. The first scan line sub-group TLG1 and the second scan linesub-group TLG2 are connected to each other by a first connection lineCNL1. Accordingly, the first scan line sub-group TLG1 and the secondscan line sub-group TLG2 form one loop.

Each of the first to fourth source line groups RG10, RG20, RG30, andRG40 includes a first source line sub-group RLG1, a second source linesub-group RLG2, and a third source line sub-group RLG3. Each of thefirst source line sub-group RLG1, the second source line sub-group RLG2,and the third source line sub-group RLG3 includes at least one sourceline.

The first source line sub-group RLG1, the second source line sub-groupRLG2, and the third source line sub-group RLG3 include the same numberof source lines. For example, in FIG. 5, each source line sub-groupincludes three source lines. First ends of the three source lines areconnected to each other and second ends of the three source lines areconnected to each other. It should be understood that various numbers ofsource lines may be included in each source line sub-group.

The first source line sub-group RLG1, the second source line sub-groupRLG2, and the third source line sub-group RLG3 are arranged in the firstdirection DR1. The third source line sub-group RLG3 is disposed betweenthe first source line sub-group RLG1 and the second source linesub-group RLG2. The first source line sub-group RLG1 and the secondsource line sub-group RLG2 are connected to each other by a secondconnection line CNL2.

FIG. 6 is a view showing the touch panel operated in the first mode.FIGS. 7A and 7B are views showing the touch panel operated in the secondmode, and FIG. 8 is a timing diagram showing signals generated in thesecond mode. Hereinafter, the operation of the touch panel will bedescribed in detail with reference to FIGS. 6,7A, 7B, and 8.

The touch panel operated in the first mode and shown in FIG. 6calculates the coordinate information of the input position in the sameway as an electrostatic capacitive type touch panel. The first to fourthscan line groups TG10, TG20, TG30, and TG40 correspond to input touchelectrodes of the electrostatic capacitive type touch panel, and thefirst to fourth source line groups RG10, RG20, RG30, and RG40 correspondto output touch electrodes of the electrostatic capacitive type touchpanel.

The first to fourth scan line groups TG10, TG20, TG30, and TG40 arecapacitive-coupled to the first to fourth source line groups RG10, RG20,RG30, and RG40. Due to the capacitive coupling, capacitors are formedbetween the first to fourth scan line groups TG10, TG20, TG30, and TG40and the first to fourth source line groups RG10, RG20, RG30, and RG40.

The first to fourth scan line groups TG10, TG20, TG30, and TG40 receivescan signals TS1-1 to TS1-4 (hereinafter, referred to as first scansignals), respectively, in different periods from each other. The firstto fourth scan line groups TG10, TG20, TG30, and TG40 sequentiallyreceive the first scan signals TS1-1 to TS1-4. The first to fourthsource line groups RG10, RG20, RG30, and RG40 output sensing signalsSS1-1 to SS1-4 (hereinafter, referred to as first sensing signals),respectively.

An area in which the second scan line group TG20 crosses the secondsource line group RG20 may be the input position PP1 (hereinafter,referred to as first input position). The first sensing signal SS1-2output from the second source line group RG20 may then have a leveldifferent from a level of the first sensing signals SS1-1, SS1-3, andSS1-4 of other source line groups RG10, RG30, and RG40.

The touch sensor 600 calculates a two-dimensional coordinate informationof the first input position PP1 based on a time at which the firstsensing signal SS1-2 having the different level is sensed and a relativeposition of the second source line group RG20 with respect to the firstto fourth source line groups RG10, RG20, RG30, and RG40.

The touch panel operated in the second mode (shown in FIGS. 7A and 7B)calculates the coordinate information of the input position in the sameway as an electromagnetic induction type touch panel. The first tofourth scan line groups TG10, TG20, TG30, and TG40 correspond to inputcoils of the electromagnetic induction type touch panel, and the firstto fourth source line groups RG10, RG20, RG30, and RG40 correspond tooutput coils of the electromagnetic induction type touch panel.

Referring to FIG. 7A, the first to fourth scan line groups TG10, TG20,TG30, and TG40 receive scan signals TS2-1 to TS2-4 (hereinafter,referred to as second scan signals), respectively, in different periods.The second scan signals TS2-1 to TS2-4 are respectively applied to thefirst ends of the first scan line sub-groups TLG1 of the first to fourthscan line groups TG10, TG20, TG30, and TG40. The first end of the secondscan line sub-group TLG2 of each of the first to fourth scan line groupsTG10, TG20, TG30, and TG40 is grounded. The first end of the third scanline sub-group TLG3 of each of the first to fourth scan line groupsTG10, TG20, TG30, and TG40 is floated without receiving any voltage.

Therefore, the first scan line sub-group TLG1 and the second scan linesub-group TLG2 form a current path. A magnetic field is induced by thecurrent path formed by the first scan line sub-group TLG1 and the secondscan line sub-group TLG2. That is, the first scan line sub-group TLG1and the second scan line sub-group TLG2 form one input coil. Since thefirst to fourth scan line groups TG10, TG20, TG30, and TG40 receive thesecond scan signals TS2-1 to TS2-4 in different periods, the magneticfield is induced in different periods.

When the input device (not shown) approaches the first to fourth scanline groups TG10, TG20, TG30, and TG40, the magnetic field induced fromthe first to fourth scan line groups TG10, TG20, TG30, and TG40resonates with the resonant circuit of the input device. Thus, the inputdevice generates the resonant frequency.

Referring to FIG. 7B, the first to fourth source line groups RG10, RG20,RG30, and RG40 output sensing signals SS2-1 to SS2-4 (hereinafter,referred to as second sensing signals), respectively, according to theresonant frequency of the input device. The second sensing signals SS2-1to SS2-4 are output from the first ends of the first source linesub-groups RGL1 of the first to fourth source line groups RG10, RG20,RG30, and RG40. The first end of the second source line sub-group RLG2of each of the first to fourth source line groups RG10, RG20, RG30, andRG40 is grounded. The first end of the third source line sub-group RLG3of each of the first to fourth source line groups RG10, RG20, RG30, andRG40 is floated without receiving any voltage.

An input position PP2 (hereinafter, referred to as second inputposition) may correspond to an area in which the second scan line groupTG20 crosses the second source line group RG20. The second sensingsignal SS2-2 output from the second source line group RG20 has a leveldifferent from a level of the second sensing signals SS2-1, SS2-3, andSS2-4 of other source line groups RG10, RG30, and RG40.

The touch sensor 600 calculates a two-dimensional coordinate informationof the second input position PP2 based on a time at which the secondsensing signal SS2-2 having the different level is sensed and a relativeposition of the second source line group RG20 with respect to the firstto fourth source line groups RG10, RG20, RG30, and RG40.

Referring to FIGS. 7A, 7B, and 8, the second scan signals TS2-1 to TS2-4are sequentially applied to the first scan line sub-groups TLG1 of thefirst to fourth scan line groups TG10, TG20, TG30, and TG40. Aninduction signal RS is generated from the input device disposed at thesecond input position PP2.

After the second scan signal TS2-2 applied to the second scan line groupTG20 is deactivated, the induction signal RS is gradually decreasedduring a predetermined period. The input device generates a frequencycorresponding to the induction signal RS that is gradually decreased.The frequency generated by the input device generates the second sensingsignal SS2-2 of the second source line group RG20.

FIG. 9 is a block diagram showing the first driver 400 shown in FIG. 5.FIG. 10 is a circuit diagram showing switching parts 430-1 to 430-4shown in FIG. 9. Hereinafter, the first driver 400 will be described indetail with reference to FIGS. 9 and 10.

The first driver 400 includes a scan signal output part 410, a selectionpart 420, and switching parts 430-1 to 430-4. FIG. 9 shows fourswitching parts 430-1 to 430-4 (hereinafter, referred to as first tofourth switching parts, respectively).

The scan signal output part 410 receives the mode selection signal MSS,the first scan signal TS1, and the second scan signal TS2. The first andsecond scan signals TS1 and TS2 may be provided from an externalcircuit, e.g., a scan signal generating circuit. The scan signal outputpart 410 selectively outputs the first scan signal TS1 and the secondscan signal TS2 in response to the mode selection signal MSS.

The selection part 420 switches the first to fourth switching parts430-1 to 430-4. The selection part 420 receives the mode selectionsignal MSS and outputs switching control signals SW-1 to SW-4 and SW-10to SW-40 having different turn-on periods. The selection part 420outputs first switching control signals SW-1 to SW-4 in the first modeand outputs second switching control signals SW-10 to SW-40 in thesecond mode. The second switching control signals SW-10 to SW-40 havephases opposite to those of the first switching control signals SW-1 toSW-4.

Each of the first to fourth switching parts 430-1 to 430-4 receives thefirst scan signal TS1 from the scan signal output part 410 in the firstmode and receives the second scan signal TS2 from the scan signal outputpart 410 in the second mode. The first to fourth switching parts 430-1to 430-4 respectively receive the first switching control signals SW-1to SW-4 in the first mode and respectively receive the second switchingcontrol signals SW-10 to SW-40 in the second mode.

In the first mode, the first to fourth switching parts 430-1 to 430-4apply the first scan signal TS1 to the first to fourth scan line groupsTG10, TG20, TG30, and TG40 in response to the first switching controlsignals SW-1 to SW-4. In the second mode, the first to fourth switchingparts 430-1 to 430-4 apply the second scan signal TS2 to the first tofourth scan line groups TG10, TG20, TG30, and TG40 in response to thesecond switching control signals SW-10 to SW-40.

Referring to FIG. 10, each of the first to fourth switching parts 430-1to 430-4 includes a first switch ST1, a second switch ST2, and a thirdswitch ST3. Hereafter, the first switch 430-1 will be described as arepresentative example.

The first switch ST1 applies the first scan signal TS1 to the first scanline sub-group TLG1 in the first mode and applies the second scan signalTS2 to the first scan line sub-group TLG1 in the second mode.

The first switch ST1 may be, but is not limited to, a ComplementaryMetal-Oxide Semiconductor (CMOS) transistor. The CMOS transistorincludes an n-type transistor and a p-type transistor. Controlelectrodes of the n-type transistor and the p-type transistor arecommonly connected to each other to receive the first switching controlsignal SW-1 and the second switching control signal SW-10. In somecases, the first switching control signal SW-1 has a high level in theturn-on period and the second switching control signal SW-10 has a lowlevel in the turn-on period.

An input electrode of the n-type transistor receives the first scansignal TS1 and an input electrode of the p-type transistor receives thesecond scan signal TS2. An output electrode of the n-type transistor andan output electrode of the p-type transistor are commonly connected tothe first scan line sub-group TLG1.

The second switch ST2 applies the first scan signal TS1 to the secondscan line sub-group TLG2 in the first mode and applies the second scansignal TS2 to the second scan line sub-group TLG2 in the second mode.

The second switch ST2 may be, but is not limited to, a CMOS transistor.Control electrodes of an n-type transistor and a p-type transistor ofthe second switch ST2 are commonly connected to each other to receivethe first switching control signal SW-1 and the second switching controlsignal SW-10.

An input electrode of the n-type transistor receives the first scansignal TS1 and an input electrode of the p-type transistor receives aground voltage. An output electrode of the n-type transistor and anoutput electrode of the p-type transistor are commonly connected to thesecond scan line sub-group TLG2.

The n-type transistor of each of the first and second switches ST1 andST2, which are turned on in the first mode, applies the first scansignal TS1 to the first and second scan line sub-groups TLG1 and TLG2.The p-type transistor of each of the first and second switches ST1 andST2, which are turned on in the second mode, forms a current path in thefirst scan signal TS1 to the first and second scan line sub-groups TLG1and TLG2.

The third switch ST3 applies the first scan signal TS1 to the third scanline sub-group TLG3 in the first mode and floats the third scan linesub-group TLG3 in the second mode.

The third switch ST3 may be, but is not limited to, an n-channel MOS(NMOS) transistor. A control electrode of the NMOS transistor receivesthe first switching control signal SW-1 and the second switching controlsignal SW-10. An input electrode of the NMOS transistor receives thefirst scan signal TS1 and an output electrode of the NMOS transistor isconnected to the third scan line sub-group TLG3. In the second mode, thethird switch ST3 is turned off by the second switching control signalSW-10 having the low level, and thus the third scan line sub-group TLG3is floated.

In some cases, the n-type transistor and the p-type transistor of theCMOS transistor may be switched. In such cases, the third switch ST3 maybe a p-channel MOS (PMOS) transistor.

FIG. 11 is a block diagram showing the second driver 500 and the touchsensor shown 600 in FIG. 5, and FIG. 12 is a circuit diagram showing asensing signal output part shown in FIG. 11. Hereinafter, the seconddriver 500 and the touch sensor 600 will be described in detail withreference to FIGS. 11 and 12.

Referring to FIG. 11, the second driver 500 includes a plurality ofsensing signal output parts 502, 504, 506, and 508. FIG. 11 shows foursensing signal output parts 502, 504, 506, and 508 (hereinafter,referred to as first to fourth sensing signal output parts,respectively).

The first to fourth sensing signal output parts 502, 504, 506, and 508are connected to the first to fourth source line groups RG10, RG20,RG30, and RG40, respectively. Each of the first to fourth sensing signaloutput parts 502, 504, 506, and 508 receives a control signal. Thecontrol signal may be the mode selection signal MSS. In some cases, thecontrol signal may be another signal having the same phase as the modeselection signal MSS.

In the first mode, the first to fourth sensing signal output parts 502,504, 506, and 508 output the first sensing signals SS1-1 to SS1-4 (referto FIG. 6) from the first to fourth source line groups RG10, RG20, RG30,and RG40. In the second mode, the first to fourth sensing signal outputparts 502, 504, 506, and 508 output the second sensing signals SS2-1 toSS2-4 (refer to FIG. 7B) from the first to fourth source line groupsRG10, RG20, RG30, and RG40.

Referring to FIG. 12, each of the first to fourth sensing signal outputparts 502, 504, 506, and 508 includes a first switch ST10, a secondswitch ST20, and a third switch ST30. Hereinafter, the first sensingsignal output part 502 will be described as a representative example.

The first switch ST10 outputs the first sensing signal SS1-1 from thefirst end of the first source line sub-group RLG1 in the first mode andoutputs the second sensing signal SS2-1 from the first end of the firstsource line sub-group RLG1 in the second mode. The first switch ST10 maybe, but is not limited to, a CMOS transistor.

The CMOS transistor includes an n-type transistor and a p-typetransistor. Control electrodes of the n-type transistor and the p-typetransistor are commonly connected to each other to receive the modeselection signal MSS. The mode selection signal MSS has a high level inthe first mode and a low level in the second mode.

An input electrode of the n-type transistor is connected to the firstsource line sub-group RLG1 and an output electrode of the n-typetransistor is connected to the touch sensor 600. An input electrode ofthe p-type transistor is connected to the first source line sub-groupRLG1 and an output electrode of the p-type transistor is connected tothe touch sensor 600. The output electrode of the n-type transistorapplies the first sensing signal SS1-1 to the touch sensor 600 and theoutput electrode of the p-type transistor applies the second sensingsignal SS2-1 to the touch sensor 600.

The second switch ST20 outputs the first sensing signal SS1-1 from thefirst end of the second source line sub-group RLG2 in the first mode andgrounds the second source line sub-group RLG2 in the second mode. Thesecond switch ST20 may be, but is not limited to, a CMOS transistor.

Control electrodes of the n-type transistor and the p-type transistor ofthe second switch ST20 are commonly connected to each other to receivethe mode selection signal MSS. An input electrode of the n-typetransistor is connected to the second source line sub-group RLG2 and anoutput electrode of the n-type transistor is connected to the touchsensor 600. An input electrode of the p-type transistor is connected tothe second source line sub-group RLG2 and an output electrode of thep-type transistor receives the ground voltage.

The third switch ST30 outputs the first sensing signal SS1-1 to thetouch sensor 600 in the first mode and floats the third source linesub-group RLG3 in the second mode.

The third switch ST30 may be, but is not limited to, an NMOS transistor.A control electrode of the NMOS transistor receives the mode selectionsignal MSS. An input electrode of the NMOS transistor is connected tothe third source line sub-group RLG3 and an output electrode of the NMOStransistor is connected to the touch sensor 600. In some cases, then-type transistor and the p-type transistor of the CMOS may be switched.In such cases, the third switch ST30 may be a PMOS transistor.

Referring to FIG. 11 again, the touch sensor 600 includes signalprocessors 610-1 to 610-4 (hereinafter, referred to as first to fourthsignal processing parts, respectively), a multiplexer 620, and acoordinate calculator 630.

The first to fourth signal processors 610-1 to 610-4 respectivelyreceive the first sensing signals SS1-1 to SS1-4 (refer to FIG. 6) fromthe first to fourth sensing signal output parts 502, 504, 506, and 508in the first mode and respectively receive the second sensing signalsSS2-1 to SS2-4 (refer to FIG. 7B) from the first to fourth sensingsignal output parts 502, 504, 506, and 508 in the second mode. Each ofthe first to fourth signal processors 610-1 to 610-4 includes a firstmode signal processor (not shown) to process the first sensing signalsSS1-1 to SS1-4 and a second mode signal processor (not shown) to processthe second sensing signals SS2-1 to SS2-4.

The first mode signal processor includes an amplifier, a noise filter,and an analog-to-digital converter. The amplifier amplifies the firstsensing signals SS1-1 to SS1-4. The noise filter removes noises from theamplified first sensing signals SS1-1 to SS1-4. The analog-to-digitalconverter converts the first sensing signals SS1-1 to SS1-4 from whichthe noises are removed to first digital signals.

The second mode signal processor includes an amplifier, a band-passfilter, a wave detector, a sample-hold circuit, and an analog-to-digitalconverter. The second sensing signals SS2-1 to SS2-4 are converted tosecond digital signals using the second mode signal processor.

The multiplexer 620 selectively applies the first and second digitalsignals from the first to fourth signal processors 610-1 to 610-4 to thecoordinate calculator 630. The coordinate calculator 630 compares thefirst and second digital signals to a reference value to sense theoutput touch electrode or the output coil in which the external inputoccurs. The coordinate calculator 630 calculates the coordinateinformation of the first input position PP1 (refer to FIG. 6) from thefirst digital signals and calculates the coordinate information of thesecond input position PP2 (refer to FIG. 7B) from the second digitalsignals.

FIGS. 13 and 14 are cross-sectional views showing display panelsaccording to exemplary embodiments of the present disclosure. In FIGS.13 and 14, the same reference numerals denote the same elements in FIGS.1 to 3, and thus detailed descriptions of the same elements will beomitted.

Referring to FIGS. 13 and 14, the scan lines TL and the source lines RLare disposed on or under the second base substrate SUB2. In FIG. 13, thescan lines TL and the source lines RL are disposed under the second basesubstrate SUB2. In FIG. 14, the scan lines TL and the source lines RLare disposed on the second base substrate SUB2.

Referring to FIG. 13, a black matrix BM including a plurality ofopenings BM-OP is disposed on a lower surface of the second basesubstrate SUB2 of the display panel LDP10. Color filters CF are disposedin the openings BM-OP. The scan lines TL and the source lines RL aredisposed to overlap, at least partially, with the black matrix BM.

The scan lines TL are disposed on a lower surface of the black matrixBM. A third insulating layer IL-1 is disposed on the black matrix BM andthe color filters CF to cover the scan lines TL. The third insulatinglayer IL-1 provides a flat surface thereon. A fourth insulating layerIL-2 is disposed on the third insulating layer IL-1 to cover the sourcelines RL. Each of the third insulating layer IL-1 and the fourthinsulating layer IL-2 includes at least one organic layer and/or atleast one inorganic layer.

Referring to FIG. 14, a black matrix BM including a plurality ofopenings BM-OP is disposed on a lower surface of the second basesubstrate SUB2 of the display panel LDP20. Color filters CF are disposedin the openings BM-OP. The source lines RL are disposed on an uppersurface of the second base substrate SUB2 to overlap, at leastpartially, with the black matrix BM.

A third insulating layer IL-1 is disposed on the upper surface of thesecond base substrate SUB to cover the source lines RL. The thirdinsulating layer IL-1 provides a flat surface thereon. The scan lines TLare disposed on the third insulating layer IL-1. A fourth insulatinglayer IL-2 is disposed on the third insulating layer IL-1 to cover thescan lines TL. A protection layer PL is disposed on the fourthinsulating layer IL-2. In some cases, the positions of the scan lines TLand the source lines RL may be switched.

FIGS. 15A and 15B are plan views showing display panels according toexemplary embodiments of the present disclosure. In FIGS. 15A and 15B,the same reference numerals denote the same elements in FIGS. 1 to 3,and thus detailed descriptions of the same elements will be omitted.

Referring to FIGS. 15A and 15B, a plurality of scan lines TL1 to TL9 anda plurality of source lines RL1 to RL10 are disposed in the blockingarea SA. Each of the scan lines TL1 to TL9 further includes firstsensing electrodes SSE1 disposed at positions in which each of the scanlines TL1 to TL9 crosses the source lines RL1 to RL10. In addition, eachof the source lines RL1 to RL9 further includes second sensingelectrodes SSE2 disposed at positions in which each of the source linesRL1 to RL9 crosses the scan lines TL1 to TL9.

The first sensing electrodes SSE1 are overlapped with the second sensingelectrodes SSE2. The overlap areas between the scan lines TL1 to TL9 andthe source lines RL1 to RL10 are increased by the first sensingelectrodes SSE1 and the second sensing electrodes SSE2. Accordingly, thecapacitance variation of capacitors formed between the scan lines TL1 toTL9 and the source lines RL1 to RL10 becomes large. Therefore, touchsensitivity in the first mode may be improved. In some cases, either thefirst sensing electrodes SSE1 or the second sensing electrodes SSE2 maybe omitted.

FIG. 16 is a block diagram showing a touch panel according to exemplaryembodiments of the present disclosure, FIG. 17 is a view showing a touchpanel operated in a first mode. FIGS. 18A and 18B are views showingtouch panels operated in a second mode. In FIGS. 16, 17, 18A, and 18B,the same reference numerals denote the same elements in FIGS. 1 to 15B,and thus detailed descriptions of the same elements will be omitted.

With respect to FIG. 16, a display device includes a display panel LDP(refer to FIG. 1), a signal controller 100 (refer to FIG. 1), a gatedriver 200 (refer to FIG. 1), a data driver 300 (refer to FIG. 1), firstdrivers 400-1 and 400-2, second drivers 500-1 and 500-2, and a touchsensor 600. FIGS. 16 to 18B show thirty-six scan lines TL1 to TL36 andthirty-six source lines RL1 to RL36. The first and second scan drivers400-1 and 400-2, the first and second source drivers 500-1 and 500-2,the touch sensor 600, the scan lines TL1 to TL36, and the source linesRL1 to RL36 form the touch panel.

Referring to FIGS. 16 to 18B, the scan lines TL1 to TL36 are extended inthe first direction DR1 and arranged in the second direction DR2. Thesource lines RL1 to RL36 are extended in the second direction DR2 andarranged in the first direction DR1. The scan lines TL1 to TL36 aregrouped into four scan line groups TG10, TG20, TG30, and TG40, and thesource lines RL1 to RL36 are grouped into four source line groups RG10,RG20, RG30, and RG40.

Each of the first to fourth scan line groups TG10, TG20, TG30, and TG40includes a first scan line sub-group TLG1, a second scan line sub-groupTLG2, and a third scan line sub-group TLG3. The third scan linesub-group TLG3 is disposed between the first scan line sub-group TLG1and the second scan line sub-group TLG2. Each of the first scan linesub-group TLG1, the second scan line sub-group TLG2, and the third scanline sub-group TLG3 includes at least one scan line.

The first scan line sub-group TLG1, the second scan line sub-group TLG2,and the third scan line sub-group TLG3 include the same number of scanlines. For instance, each scan line sub-group includes three scan linesas shown in FIGS. 16 and 17. It should be understood that variousnumbers of scan lines may be included in each scan line sub-group. Thethree scan lines are connected to each other at two ends thereof.

Each of the first to fourth source line groups RG10, RG20, RG30, andRG40 includes a first source line sub-group RLG1, a second source linesub-group RLG2, and a third source line sub-group RLG3. The third sourceline sub-group RLG3 is disposed between the first source line sub-groupRLG1 and the second source line sub-group RLG2. Each of the first sourceline sub-group RLG1, the second source line sub-group RLG2, and thethird source line sub-group RLG3 includes at least one source line.

The first source line sub-group RLG1, the second source line sub-groupRLG2, and the third source line sub-group RLG3 include the same numberof source lines. Three source lines of each of the first to third sourceline sub-groups RLG1 to RLG3 are connected to each other at two endsthereof. It should be understood that various numbers of source linesmay be included in each source line sub-group.

The first scan driver 400-1 is connected to first ends of the first tofourth scan line groups TG10, TG20, TG30, and TG40, and the second scandriver 400-2 is connected to the second ends of the first to fourth scanline groups TG10, TG20, TG30, and TG40. For instance, the first scandriver 400-1 is connected to the first end of the first scan linesub-group TLG1, the second scan line sub-group TLG2, and the third scanline sub-group TLG3 of each of the first to fourth scan line groupsTG10, TG20, TG30, and TG40. The second scan driver 400-2 is connected tothe second end of the first scan line sub-group TLG1 and the second scanline sub-group TLG2 of each of the first to fourth scan line groupsTG10, TG20, TG30, and TG40.

The first source driver 500-1 is connected to first ends of the first tofourth source line groups RG10, RG20, RG30, and RG40, and the secondsource driver 500-2 is connected to the second ends of the first tofourth source line groups RG10, RG20, RG30, and RG40. For example, thefirst source driver 500-1 is connected to the first end of the firstsource line sub-group RLG1, the second source line sub-group RLG2, andthe third source line sub-group RLG3 of each of the first to fourthsource line groups RG10, RG20, RG30, and RG40. The second source driver500-2 is connected to the second end of the first source line sub-groupRLG1 and the second source line sub-group RLG2 of each of the first tofourth source line groups RG10, RG20, RG30, and RG40.

FIG. 17 shows the touch panel operated in the first mode. The touchpanel operated in the first mode calculates the coordinate informationof the input position in the same way as an electrostatic capacitivetype touch panel. The method of calculating the coordinate informationof the input position is the same as that described with reference toFIG. 6, and thus detailed descriptions thereof will be omitted.

The touch panel shown in FIGS. 18A and 18B and operated in the secondmode calculates the coordinate information of the input position in thesame way as an electromagnetic induction type touch panel. The first tofourth scan line groups TG10, TG20, TG30, and TG40 correspond to inputcoils of the electromagnetic induction type touch panel, and the firstto fourth source line groups RG10, RG20, RG30, and RG40 correspond tooutput coils of the electromagnetic induction type touch panel.

Referring to FIG. 18A, the first to fourth scan line groups TG10, TG20,TG30, and TG40 receive second scan signals TS2-1 to TS2-4 in differentperiods. The second scan signals TS2-1 to TS2-4 are respectively appliedto first ends of the first scan line sub-groups TLG1 and to second endsof the second scan line sub-group TLG2 of the first to fourth scan linegroups TG10, TG20, TG30, and TG40. The second end of the first scan lingsub-group TLG1 and the first end of the second scan line sub-group TLG2of each of the first to fourth scan line groups TG10, TG20, TG30, andTG40 are grounded. The third scan line sub-group TLG3 of each of thefirst to fourth scan line groups TG10, TG20, TG30, and TG40 is floatedwithout receiving any voltage.

In the second mode, a direction in which a current flows through thefirst scan line sub-group TLG1 of each of the first to fourth scan linegroups TG10, TG20, TG30, and TG40 is opposite to a direction in which acurrent flows through the second scan line sub-group TLG2 of each of thefirst to fourth scan line groups TG10, TG20, TG30, and TG40. A magneticfield is induced by the currents flowing through the first scan linesub-group TLG1 and the second scan line sub-group TLG2 in oppositedirections. Although the first scan line sub-group TLG1 is not connectedto the second scan line sub-group TLG2, the first scan line sub-groupTLG1 and the second scan line sub-group TLG2 form one coil. Since thefirst to fourth scan line groups TG10, TG20, TG30, and TG40 receive thesecond scan signals TS2-1 to TS2-4 in different periods, the magneticfield is induced in different periods.

When the input device (not shown) approaches the first to fourth scanline groups TG10, TG20, TG30, and TG40, the magnetic field induced fromthe first to fourth scan line groups TG10, TG20, TG30, and TG40resonates with the resonant circuit of the input device. Thus, the inputdevice causes generation of the resonant frequency.

Referring to FIG. 18B, the first to fourth source line groups RG10,RG20, RG30, and RG40 output second sensing signals SS2-1 to SS2-4according to the resonant frequency of the input device. The secondsensing signals SS2-1 to SS2-4 are output from the first ends of thefirst source line sub-groups RGL1 and the second ends of the secondsource line sub-groups RLG2 of the first to fourth source line groupsRG10, RG20, RG30, and RG40. The second end of the first source linesub-group RLG1 and the first end of the second source line sub-groupRLG2 of each of the first to fourth source line groups RG10, RG20, RG30,and RG40 are grounded. The third source line sub-group RLG3 of each ofthe first to fourth source line groups RG10, RG20, RG30, and RG40 isfloated without receiving any voltage.

The touch sensor 600 calculates the coordinate information about theinput position based on the second sensing signals SS2-1 to SS2-4provided from at least one of the first end of the first source linesub-group RLG1 of each of the first to fourth source line groups RG10,RG20, RG30, and RG40 or the second end of the second source linesub-group RLG2 of each of the first to fourth source line groups RG10,RG20, RG30, and RG40.

FIG. 19 is a bock diagram showing the second scan driver 400-2 accordingto exemplary embodiments of the present disclosure. FIG. 20 is a blockdiagram showing the second source driver 500-2 according to exemplaryembodiments of the present disclosure. Hereinafter, the second scandriver 400-2 and the second source driver 500-2 will be described indetail with reference to FIGS. 19 and 20. The first scan driver 400-1may have the same or similar configuration and function as theconfiguration and function of the first driver 400 described withreference to FIGS. 9 and 10, and thus the detailed description of thefirst scan driver 400-1 will be omitted. In addition, the first sourcedriver 500-1 may have the same configuration and function as theconfiguration and function of the second driver 500 described withreference to FIGS. 11 and 12, and thus the detailed description of thefirst source driver 500-1 will be omitted.

Referring to FIG. 19, the second scan driver 400-2 includes switchingparts 440-1 to 440-4. The switching parts 440-1 to 440-4 respectivelyreceive the first switching control signals SW-1 to SW-4 in the firstmode and respectively receive the second switching control signals SW-10to SW-40 in the second mode.

The switching parts 440-1 to 440-4 float the second end of the firstscan line sub-group TLG1 and the second end of the second scan linesub-group TLG2 of each of the first to fourth scan line groups TG10,TG20, TG30, and TG40 in the first mode. The switching parts 440-1 to440-4 ground the second end of the first scan line sub-group TLG1 ofeach of the first to fourth scan line groups TG10, TG20, TG30, and TG40in the second mode and apply the second scan signals TS2-1 to TS2-4 tothe second end of the second scan line sub-group TLG2 of each of thefirst to fourth scan line groups TG10, TG20, TG30, and TG40 in thesecond mode.

Among the switching parts 440-1 to 440-4, two switching parts 440-1 and440-4 have been shown in FIG. 19 as an example. Each of the switchingparts 440-1 to 440-4 includes a first switch ST100 and a second switchST200.

The first switch ST100 is turned off in the first mode and turned on inthe second mode to apply the ground voltage to the second end of thefirst scan line sub-group TLG1. The second switch ST200 is turned off inthe first mode and turned on in the second mode to apply the second scansignal TS2-1 to the second end of the second scan line sub-group TLG2.The first switch ST100 and the second switch ST200 may be a PMOStransistor or a NMOS transistor. FIG. 19 shows PMOS transistors as arepresentative example.

Referring to FIG. 20, the second source driver 500-2 includes aplurality of switching parts 512 to 518. FIG. 20 shows four switchingparts 512 to 518 as an example. Each of the switching parts 512 to 518receives the mode selection signal MSS.

The switching parts 512 to 518 float the second end of the first sourceline sub-group RLG1 and the second end of the second source linesub-group RLG2 of each of the first to fourth source line groups RG10,RG20, RG30, and RG40 in the first mode. The switching parts 512 to 518ground the second end of the first source line sub-group RLG1 of each ofthe first to fourth source line groups RG10, RG20, RG30, and RG40 in thesecond mode and output the second sensing signal SS2-1 from the secondend of the second source line sub-group RLG2. The second sensing signalSS2-1 output from the second end of the second source line sub-groupRLG2 may be applied to the touch sensor 600.

Among the switching parts 512 to 518, two switching parts 512 and 518have been shown in FIG. 20 as an example. Each of the switching parts512 to 518 includes a first switch ST1000 and a second switch ST2000.Responsive to the mode selection signal MSS, the first and secondswitches ST1000 and ST2000 are turned off in the first mode and turnedon in the second mode. The first switch ST1000 and the second switchST2000 may be a PMOS transistor or a NMOS transistor. FIG. 20 shows PMOStransistors as a representative example.

FIG. 21 is a block diagram showing a display device according toexemplary embodiments of the present disclosure. FIG. 22 is a partialperspective view showing a display panel and a touch panel shown in FIG.21. FIGS. 23A and 23B are cross-sectional views taken along a line I-I′shown in FIG. 22. FIG. 21 shows the display panel DP and the touch panelTP, which are dislocated from each other to separately show the displaypanel DP and the touch panel TP.

Referring to FIG. 21, the display device includes a display panel DP, asignal controller 100, a gate driver 200, a data driver 300, and a touchpanel TP. The signal controller 100, the gate driver 200, and the datadriver 300 control the display panel DP to generate an image. Althoughnot shown in figures, the display device further includes a touch paneldriver to drive the touch panel TP and a touch sensor to calculatecoordinate information of an input position.

The display panel DP may be various types of display panels, including,for example a LCD panel. The display panel DP includes a plurality ofgate lines GL1 to GLn, a plurality of data lines DL1 to DLm, and aplurality of pixels PX11 to PXnm. The gate lines GL1 to GLn are extendedin a first direction DR1 and arranged in a second direction DR2substantially perpendicular to the first direction DR1. The data lineDL1 to DLm are extended in the second direction DR2 and arranged in thefirst direction DR1. The data lines DL1 to DLm are insulated from thegate lines GL1 to GLn while crossing the gate lines GL1 to GLn.

The pixels PX11 to PXnm are arranged in a matrix form. The pixels PX11to PXnm are arranged in pixel areas PXA11 to PXAnm, respectively. Eachof the pixels PX11 to PXnm is connected to a corresponding gate line ofthe gate lines GL1 to GLn and a corresponding data line of the datalines DL1 to DLm.

The signal controller 100 receives input image signals RGB and convertsthe input image signals RGB to image data R′G′B′ corresponding to anoperating mode of the display panel DP. In addition, the signalcontroller 100 receives various control signals CS, such as a verticalsynchronizing signal, a horizontal synchronizing signal, a main clocksignal, a data enable signal, etc., and outputs first and second controlsignals CONT1 and CONT2 and a mode selection signal MSS.

The mode selection signal MSS determines the operating mode of the touchpanel TP. The touch panel TP is operated in an electrostatic capacitivemode (hereinafter, referred to as a first mode), an electromagneticinduction mode (hereinafter, referred to as a second mode), or a hybridmode (hereinafter, referred to as a third mode).

The mode selection signal MSS may be generated on the basis of the imagedisplayed in the display panel DP. The mode selection signal MSS mayhave different levels corresponding to the operating modes. Forinstance, when the display panel DP displays a keypad image, the modeselection signal MSS is output as a signal to activate the first mode,and when the display panel DP displays a background image, the modeselection signal MSS is output as a signal to activate the third mode.In some cases, the mode selection signal MSS may be input by the user.For instance, the mode selection signal MSS is generated correspondingto an information inputted to a keypad by the user. The user may touch afirst mode activating button.

The gate driver 200 applies gate signals to the gate lines GL1 to GLn inresponse to the first control signal CONT1. The data driver 300 receivesthe second control signal CONT2 and the image data R′G′B′. The datadriver 300 converts the image data R′G′B′ to data voltages and appliesthe data voltages to the data lines DL1 to DLm.

Referring to FIG. 22, the display panel DP includes a first displaysubstrate DS1 and a second display substrate DS2, which are disposed tobe spaced apart from each other. A liquid crystal layer LCL is disposedbetween the first display substrate DS1 and the second display substrateDS2. The gate lines GL1 to GLn (refer to FIG. 1), the data lines DL1 toDLm (refer to FIG. 1), and the pixels PX11 to PXnm (refer to FIG. 1) maybe disposed on the first display substrate DS1 or the second displaysubstrate DS1.

Hereinafter, to explain the exemplary embodiments, the gate lines GL1 toGLn, the data lines DL1 to DLm, and the pixels PX11 to PXnm are assumedto be disposed on the first display substrate DS1. The second displaysubstrate DS2 includes a plurality of transmitting areas TA and ablocking area SA. The blocking area SA surrounds the transmitting areasTA. The transmitting areas TA transmit light generated by and providedfrom the backlight unit, and the blocking area SA blocks the light.

The touch panel TP is disposed on the display panel DP. The touch panelTP may be attached to the upper surface of the second display substrateDS2. The touch panel TP includes a first touch substrate TSS1, a firstconductive layer CL1, an insulating layer IL, a second conductive layerCL2, and a second touch substrate TSS2.

The first touch substrate TSS1 and the second touch substrate TSS2 maybe configured to include a plastic substrate, a glass substrate, or afilm. In addition, the first touch substrate TSS1 and the second touchsubstrate TSS2 may be an optical film, e.g., a polarizing plate. Thefirst conductive layer CL1 and the second conductive layer CL2 may beconfigured to include a transparent metal oxide material or a metalmaterial with a low reflectivity including at least one of chromiumoxide, chromium nitride, titanium oxide, titanium nitride, or alloysthereof. The insulating layer IL may be configured to include an organicinsulating material or an inorganic insulating material.

Although not shown in FIG. 22, each of the first and second conductivelayers CL1 and CL2 includes a plurality of conductive patterns. Theconductive patterns of the first conductive layer CL1 are configured toinclude portions (e.g., first portions) of first touch electrodes,second touch electrodes, first touch coils, and second touch coils, andthe conductive patterns of the second conductive layer CL2 areconfigured to include other portions (e.g., second portions) of firsttouch electrodes, second touch electrodes, first touch coils, and secondtouch coils.

The first conductive layer CL1 and the second conductive layer CL2 areinsulated from each other by the insulating layer IL. The insulatinglayer IL may have a multi-layer structure. For instance, the insulatinglayer IL may include at least one organic layer and/or at least oneinorganic layer. The organic layer and the inorganic layer in theinsulating layer IL may be stacked on one another.

Referring to FIG. 23A, the first display substrate DS1 includes a firstbase substrate SUB1, a plurality of insulating layers 10 and 20, and aplurality of pixels PX. The pixel areas PXA are defined in the firstdisplay substrate DS1 and the pixels PX are disposed on the firstdisplay substrate DS1. FIG. 23A shows three pixel areas PXA. The threepixel areas PXA correspond to a part of the pixel areas PXA11 to PXAnmshown in FIG. 21.

Each of the pixels PX includes a common electrode PE and a commonelectrode CE. In addition, each of the pixels PX further includes a thinfilm transistor (not shown). The pixel electrode PE may be disposed on alayer different from a layer on which the common electrode CE isdisposed.

The second display substrate DS2 includes a second base substrate SUB2,a black matrix BM, and a plurality of color filters CF. The black matrixBM includes openings BM-OP. The color filters CF are disposed in theopenings BM-OP. The pixel areas PXA correspond to the openings BM-OP,respectively, and the blocking area SA corresponds to the areas in whichthe black matrix BM is disposed.

As shown in FIG. 23B, the display panel DP includes the first displaysubstrate DS1 disposed on the liquid crystal layer LCL and the seconddisplay substrate DS2 disposed under the liquid crystal layer LCL. Thetouch panel TP is disposed on the first display substrate DS1. The firstdisplay substrate DS1, the second display substrate DS2, and the touchpanel TP have the same or similar structure and function as thestructure and function of the display device shown in FIG. 3A. In somecases, the color filter CF may be disposed on the first displaysubstrate DS1.

FIG. 24A is a plan view showing a pixel of a display panel DP accordingto exemplary embodiments of the present disclosure. FIG. 24B is across-sectional view taken along a line II-IP shown in FIG. 24A. FIGS.24A and 24B show the display panel DP according to the display panel DPshown in FIG. 23A and do not show the touch panel. Hereinafter, thedisplay panel DP will be described in detail with reference to FIGS. 24Aand 24B. FIGS. 24A and 24B show a plane to line switching mode pixel,but the pixel should not be limited to the plane to line switching mode.

The pixel PX includes a thin film transistor TFT, a common electrode CE,and a pixel electrode PE. The thin film transistor TFT, the commonelectrode CE, and the pixel electrode PE are disposed to overlap withthe pixel area PXA, which is the same as a transmitting area TA. In somecases, a portion of the pixel PX, e.g., the thin film transistor TFT,may be disposed to overlap with the blocking area SA.

The gate line GLi and the common line CLi are disposed on the first basesubstrate SUB1. A gate electrode GE of the thin film transistor TFT isbranched from the gate line GLi. A gate insulating layer 10-1 isdisposed on the first base substrate SUB1 to cover the gate line GLi andthe common line CLi.

Data lines DLj and DLj+1 are disposed on the gate insulating layer 10-1.A semiconductor layer AL is disposed on the gate insulating layer 10-1to overlap with the gate electrode GE. A source electrode SE of the thinfilm transistor TFT is branched from one data lines DLj of the datalines DLj and DLj+1. The source electrode SE and a drain electrode DEspaced apart from the source electrode SE are disposed on the gateinsulating layer 10-1. The source electrode SE and the drain electrodeDE are overlapped with the semiconductor layer AL.

A planarization layer 10-2 is disposed on the gate insulating layer 10-1to cover the source electrode SE, the drain electrode DE, and the datalines DLj and DLj+1. The common electrode CE is disposed on theplanarization layer 10-2. The common electrode CE is connected to thecommon line CLi through a first contact hole CH1 formed through the gateinsulating layer 10-1 and the planarization layer 10-2.

A second insulating layer 20, e.g., a passivation layer 20, is disposedon the planarization layer 10-2 to cover the common electrode CE. Thepixel electrode PE is disposed on the passivation layer 20 to overlapwith the common electrode CE. The pixel electrode PE is connected to thedrain electrode DE through a second contact hole CH2 formed through theplanarization layer 10-2 and the passivation layer 20. A protectionlayer (not shown) that protects the pixel electrode PE and an alignmentlayer (not shown) may be disposed on the passivation layer 20.

The pixel electrode PE includes a plurality of slits SLT. The pixelelectrode PE includes a first horizontal portion P1, a second horizontalportion P2 disposed to be spaced apart from the first horizontal portionP1, and a plurality of vertical portions P3 that connects the firsthorizontal portion P1 and the second horizontal portion P2. The slitsSLT are disposed between the vertical portions P3. However, the shape ofthe pixel electrode PE is not limited thereto or thereby.

The thin film transistor TFT outputs a data voltage applied to the dataline DLj in response to a gate signal applied to the gate line GLi. Thecommon electrode CE receives a reference voltage and the pixel electrodePE receives a pixel voltage corresponding to the data voltage. Thecommon electrode CE and the pixel electrode PE form a horizontalelectric field. Due to the horizontal electric field, arrangements ofdirectors included in the liquid crystal layer LCL are changed.

FIG. 25 is a plan view showing a touch panel TP according to exemplaryembodiments of the present disclosure. FIG. 26A is a plan view showingfirst touch electrodes and first touch coils shown in FIG. 25. FIG. 26Bis a plan view showing second touch electrodes and second touch coilsshown in FIG. 25. Hereinafter, the touch panel TP will be described indetail with reference to FIGS. 25, 26A, and 26B.

Referring to FIG. 25, the touch panel TP includes first touch electrodesTE1(1) to TE1(k), second touch electrodes TE2(1) to TE2(r), first touchcoils TC1(1) to TC1(p), and second touch coils TC2(1) to TC2(q) (“k”,“r”, “p”, and “q” being any whole number greater than 1). The firsttouch electrodes TE1(1) to TE1(k) are insulated from the second touchelectrodes TE2(1) to TE2(r) while crossing the second touch electrodesTE2(1) to TE2(r), and the first touch coils TC1(1) to TC1(p) areinsulated from the second touch coils TC2(1) to TC2(q) while crossingthe second touch coils TC2(1) to TC2(q).

Referring to FIG. 26A, the first touch electrodes TE1(1) to TE1(k) areextended in the first direction DR1. The first touch electrodes TE1(1)to TE1(k) are arranged in the second direction DR2 to be spaced apartfrom each other. Each of the first touch electrodes TE1(1) to TE1(k)includes a plurality of sensor parts SP1 (hereinafter, referred to asfirst sensor parts) and a plurality of connection parts CP1(hereinafter, referred to as first connection parts).

A portion of the first sensor parts SP1 and a portion of the firstconnection parts CP1 form a first touch unit TU1. The first touch unitTU1 includes the first sensor parts SP1 arranged in the first directionDR1 and the first connection parts CP1 that connect two adjacent sensorparts to each other among the first sensor parts SP1. The first touchelectrodes TE1(1) to TE1(k) may include two first touch units TU1, butthe number of the first touch units TU1 is not limited to two. That is,each of the first touch electrodes TE1(1) to TE1(k) may include onefirst touch unit TU1, or three or more first touch units TU1.

Each of the first sensor parts SP1 may have a trapezoid shape and thefirst connection parts CP1 may have a line shape. Each of the firstconnection parts CP1 connects vertices of two adjacent first sensorparts SP1 to each other. The first sensor parts SP1 having the trapezoidshape have an area greater than that of the first connection parts CP1having the line shape.

Referring to FIG. 26A, each of the first touch coils TC1(1) to TC1(p)has a loop shape extended in the first direction DR1. The first touchcoils TC1(1) to TC1(p) are arranged in the second direction DR2.

The first touch coils TC1(1) to TC1(p) may be overlapped with each otherin various ways. For instance, the first ouch coils TC1(1) to TC1(p) aresequentially overlapped with each other one by one or by groups. Asshown in FIG. 26A, each of the first touch coils TC1(1) to TC1(p) ispartially overlapped with two first touch coils adjacent thereto, andone end of each of the first touch coils TC1(1) to TC1(p) is grounded.

The first touch electrodes TE1(1) to TE1(k) are disposed in areasdefined by overlapping the first touch coils TC1(1) to TC1(p). In otherwords, the first touch electrodes TE1(1) to TE1(k) are not overlappedwith the first touch coils TC1(1) to TC1(p) and the first touch unitsTU1 are surrounded by the first touch coils TC1(1) to TC1(p).

The first touch electrodes TE1(1) to TE1(k) and the first touch coilsTC1(1) to TC1(p) may be included in the first conductive layer CL1 orthe second conductive layer CL2 shown in FIG. 22. In addition, the firsttouch electrodes TE1(1) to TE1(k) are included in one of the firstconductive layer CL1 and the second conductive layer CL2, and the firsttouch coils TC1(1) to TC1(p) are included in the other of the firstconductive layer CL1 and the second conductive layer CL2.

Referring to FIG. 26B, the second touch electrodes TE2(1) to TE2(r) areextended in the second direction DR2. The second touch electrodes TE2(1)to TE2(r) are arranged in the first direction DR1 to be spaced apartfrom each other. Each of the second touch electrodes TE2(1) to TE2(r)includes a plurality of sensor parts SP2 (hereinafter, referred to assecond sensor parts) and a plurality of connection parts CP2(hereinafter, referred to as second connection parts).

A portion of the second sensor parts SP2 and a portion of the secondconnection parts CP2 form a second touch unit TU2. The second touch unitTU2 includes the second sensor parts SP2 arranged in the seconddirection DR2 and the second connection parts CP2 that connect twoadjacent sensor parts to each other among the second sensor parts SP2.

Each of the second touch coils TC2(1) to TC2(q) has a loop shapeextended in the second direction DR2. The second touch coils TC2(1) toTC2(q) are arranged in the first direction DR1. The second touch coilsTC2(1) to TC2(q) may be overlapped with each other in various ways asthe first touch coils TC1(1) to TC1(p) shown in FIG. 26A. As shown inFIG. 26B, each of the second touch coils TC2(1) to TC2(q) is partiallyoverlapped with two second touch coils adjacent thereto, and one end ofeach of the second touch coils TC2(1) to TC2(q) is grounded.

The second touch electrodes TE2(1) to TE2(r) are disposed in areasdefined by overlapping the second touch coils TC2(1) to TC2(q). In otherwords, the second touch electrodes TE2(1) to TE2(r) are not overlappedwith the second touch coils TC2(1) to TC2(q), and the second touch unitsTU2 are surrounded by the second touch coils TC2(1) to TC2(q).

The second touch electrodes TE2(1) to TE2(r) and the second touch coilsTC2(1) to TC2(q) may be included in one of the first conductive layerCL1 and the second conductive layer CL2 shown in FIG. 22, in which thefirst touch electrodes TE1(1) to TE1(k) and the first touch coils TC1(1)to TC1(p) are not included. In addition, the second touch electrodesTE2(1) to TE2(r) are included in one of the first conductive layer CL1and the second conductive layer CL2, and the second touch coils TC2(1)to TC2(q) are included in the other of the first conductive layer CL1and the second conductive layer CL2.

FIG. 27A is a plan view showing first touch electrodes TE1(1) to TE1(k)and first touch coils TC1(1) to TC1(p) shown in FIG. 25. FIG. 27B is aplan view showing second touch electrodes TE2(1) to TE2(r) and secondtouch coils TC2(1) to TC2(q) shown in FIG. 25. Hereinafter, theoperation of the touch panel TP will be described in detail withreference to FIGS. 27A and 27B.

Referring to FIG. 27A, the first touch electrodes TE1(1) to TE1(k) areinsulated from the second touch electrodes TE2(1) to TE2(r) whilecrossing the second touch electrodes TE2(1) to TE2(r). The first touchelectrodes TE1(1) to TE1(k) correspond to input touch electrodes and thesecond touch electrodes TE2(1) to TE2(r) correspond to output touchelectrodes. The first touch electrodes TE1(1) to TE1(k) and the secondtouch electrodes TE2(1) to TE2(r) may provide information to calculatethe coordinate information of the input position in the same way as inan electrostatic capacitive type touch panel.

The first touch electrodes TE1(1) to TE1(k) are capacitive-coupled tothe second touch electrodes TE2(1) to TE2(r). When first scan signalsTS1(1) to TS1(k) are applied to the first touch electrodes TE1(1) toTE1(k), a capacitance is formed between the first sensor parts SP1 andthe second sensor parts SP2.

The first touch electrodes TE1(1) to TE1(k) sequentially receive thefirst scan signals TS1(1) to TS1(k). The first scan signals TS1(1) toTS1(k) are activated in different periods from each other. The secondtouch electrodes TE2(1) to TE2(r) outputs sensing signals SS1(1) toSS1(r) (hereinafter, referred to as first sensing signals) generatedfrom the first scan signals TS1(1) to TS1(k).

An area in which the second first touch electrode TE1(2) of the firsttouch electrodes TE1(1) to TE1(k) crosses the second touch electrodeTE2(2) of the second touch electrodes TE2(1) to TE2(r) may be the inputposition PP1 (hereinafter, referred to as a first input position). Thefirst input position PP1 may be generated by an input device, e.g.,user's finger.

The first sensing signal SS1(2) output from the second touch electrodeTE2(2) of the second touch electrodes TE2(1) to TE2(r) has a leveldifferent from that of the first sensing signals SS1(1), and SS1(3) toSS1(r) output from other second touch electrodes TE2(1) and TE2(3) toTE2(r).

The coordinate information in the second direction DR2 of the firstinput position PP1 is calculated on the basis of the time at which thefirst sensing signal SS1(2) having the different level is sensed, andthe coordinate information in the first direction DR1 of the first inputposition PP1 is calculated on the basis of the relative position of thesecond touch electrode TE2(2) with respect to the second touchelectrodes TE2(1) to TE2(r).

Referring to FIG. 27B, the first touch coils TC1(1) to TC1(p) areinsulated from the second touch coils TC2(1) to TC2(q) while crossingthe second touch coils TC2(1) to TC2(q). The first touch coils TC1(1) toTC1(p) correspond to input coils of an electromagnetic induction typetouch panel and the second touch coils TC2(1) to TC2(q) correspond tooutput coils of an electromagnetic induction type touch panel. The firsttouch coils TC1(1) to TC1(p) and the second touch coils TC2(1) to TC2(q)may provide information to calculate the coordinate information of theinput position in the same way as in an electromagnetic induction typetouch panel.

The first touch coils TC1(1) to TC1(p) receive scan signals TS2(1) toTS2(p) (hereinafter, referred to as second scan signals) activated indifferent periods from each other. Each of the first touch coils TC1(1)to TC1(p) generates the magnetic field in response to a correspondingscan signal of the second scan signals TS2(1) to TS2(p).

When the input device (not shown) approaches to the first touch coilsTC1(1) to TC1(p), the magnetic field induced from the first touch coilsTC1(1) to TC1(p) resonates with the resonant circuit of the inputdevice. Thus, the input device causes generation of the resonantfrequency. In the present exemplary embodiment, the input device may be,but is not limited to, a stylus pen with an LC resonant circuit. Thesecond touch coils TC2(1) to TC2(q) output sensing signals SS2(1) toSS2(q) (hereinafter, referred to as second sensing signals) according tothe resonant frequency.

An area in which the second first touch coil TC1(2) of the first touchcoils TC1(1) to TC1(p) crosses the second touch coil TC2(2) of thesecond touch coils TC2(1) to TC2(q) may be the input position PP2(hereinafter, referred to as a second input position). The secondsensing signal SS2(2) output from the second touch coil TC2(2) of thesecond touch coils TC1(1) to TC2(q) may have a level different from thatof the second sensing signals SS2(1) and SS2(3) to SS2(q) output fromother second touch coils TC2(1) and TC2(3) to TC2(q).

A two-dimensional coordinate information of the second input positionPP2 is calculated on the basis of the time at which the second sensingsignal SS2(2) having the different level is sensed, and the relativeposition of the second touch coil TC2(2) with respect to the secondtouch coils TC1(1) to TC2(q).

In some cases, the first touch coils TC1(1) to TC1(p) and the secondtouch coils TC2(1) to TC2(q) may have functions of the input and outputcoils, respectively. Hereinafter, the operation of the touch panel TPincluding the first and second touch coils TC1(1) to TC1(p) and TC2(1)to TC2(q), which have functions of the input and output coils, will bedescribed in detail on the assumption that the touch event occurs at thesecond input position PP2.

The first touch coils TC1(1) to TC1(p) receive the scan signals during afirst scan period. The input device causes generation of the resonantfrequency according to the magnetic field induced from the first touchcoils TC1(1) to TC1(p). After the first scan period (hereinafter,referred to as a first sensing period), the first touch coils TC1(1) toTC1(p) receive/detect the resonant frequency.

During the first sensing period, the first touch coils TC1(1) to TC1(p)output the sensing signals according to the resonant frequency. At leastone first touch coil disposed on the second input position PP2 outputsthe sensing signal having a level different from those of other firsttouch coils.

After the first sensing period, the second touch coils TC2(1) to TC2(q)receive other scans signals during a second scan period. The inputdevice causes generation of the resonant frequency according to themagnetic field induced from the second touch coils TC2(1) to TC2(q).After the second scan period (hereinafter, referred to as a secondsensing period), the second touch coils TC2(1) to TC2(q) receive/detectthe resonant frequency.

During the second sensing period, the second touch coils TC2(1) toTC2(q) output the sensing signals according to the resonant frequency.At least one second touch coil disposed on the second input position PP2outputs the sensing signal having a level different from those of othersecond touch coils.

The coordinate information of the second input position PP2 iscalculated on the basis of the sensing signal output from the at leastone first touch coil disposed on the second input position PP2 and thesensing signal output from the at least one second touch coil disposedon the second input position PP2.

FIG. 28A is a block diagram showing a touch panel driver 400T1 accordingto exemplary embodiments of the present disclosure. FIG. 28B is a blockdiagram showing a touch sensor 500T1 according to exemplary embodimentsof the present disclosure. Hereinafter, the touch panel driver 400T1 andthe touch sensor 500T1 will be described in detail with reference toFIGS. 28A and 28B.

The touch panel driver 400T1 includes a first scan signal output part410T1, a second scan signal output part 420T1, and switching parts 430-1and 430-2. The first scan signal output part 410T1 outputs first scansignals TS1(1) to TS1(k), and the second scan signal output part 420T1outputs the second scan signals TS2(1) to TS2(p).

The first scan signal output part 410T1 and the second scan signaloutput part 420T1 are turned on or turned off in response to the modeselection signal MSS. The first scan signal output part 410T1 is turnedon in the first mode to sequentially output the first scan signalsTS1(1) to TS1(k). The second scan signal output part 420T1 is turned onin the second mode to sequentially output the second scan signals TS2(1)to TS2(p).

The switching parts 430-1 and 430-2 include first switching parts 430-1and second switching parts 430-2. Each of the first switching parts430-1 receives a corresponding first scan signal of the first scansignals TS1(1) to TS1(k) and a corresponding second scan signal of thesecond scan signals TS2(1) to TS2(p). Responsive to the mode selectionsignal MSS, each of the first switching parts 430-1 applies thecorresponding first scan signal TS1(1) to TS1(k) to the correspondingfirst touch electrode or applies the corresponding second scan signalTS2(1) to TS2(p) to the corresponding first touch coil. Each of thefirst switching parts 430-1 may be a CMOS transistor.

Each of the second switching parts 430-2 receives a corresponding secondscan signal of the second scans signals TS2(1) to TS2(p). Each of thesecond switching parts 430-2 is turned on in the first mode and turnedoff in the second mode. Each of the second switching parts 430-2 may bean NMOS transistor or a PMOS transistor. In some cases, when the numberof the first touch electrodes TE1(1) to TE1(k) included in the touchpanel TP is equal to the number of the first touch coils TC1(1) toTC1(p) included in the touch panel TP, the touch panel driver 400T1 doesnot include the second switching parts 430-2.

Referring to FIG. 28B, the touch sensor 500T1 includes third and fourthswitching parts 510-1 and 510-2, a selector 520, a first signalprocessor 530, a second signal processor 540, and a coordinatecalculator 550.

The switching parts 510-1 and 510-2 include third switching parts 510-1and fourth switching parts 510-2. Each of the third switching parts510-1 receives a corresponding first sensing signal of the first sensingsignals SS1(1) to SS1(r) and a corresponding second sensing signal ofthe second sensing signals SS2(1) to SS2(q). Responsive to the modeselection signal MSS, each of the third switching parts 510-1 appliesthe corresponding first sensing signal to the selector 520 in the firstmode and applies the corresponding second sensing signal to the selector520 in the second mode. Each of the third switching parts 510-1 may be aCMOS transistor.

Each of the fourth switching parts 510-2 receives a corresponding secondsensing signal of the second sensing signals SS2(1) to SS2(q). Each ofthe fourth switching parts 510-2 is turned on in response to the modeselection signal MSS. Each of the fourth switching parts 510-2 may be anNMOS transistor or a PMOS transistor. In some cases, when the number ofthe second touch electrodes TE2(1) to TE2(r) included in the touch panelTP is equal to the number of the second touch coils TC2(1) to TC2(q)included in the touch panel TP, the second switching parts 430-2 may beomitted from the touch panel driver 400T1.

The selector 520 applies the first sensing signals SS1(1) to SS1(r) tothe first signal processor 530 in response to the mode selection signalMSS and applies the second sensing signals SS2(1) to SS2(q) to thesecond signal processor 540 in response to the mode selection signalMSS.

The first signal processor 530 includes an amplifier, a noise filter,and an analog-to-digital converter. The amplifier amplifies the firstsensing signals SS1(1) to SS1(r). The noise filter removes noises fromthe amplified first sensing signals SS1(1) to SS1(r). Theanalog-to-digital converter converts the first sensing signals SS1(1) toSS1(r) from which the noises are removed to first digital signals. Thecoordinate calculator 550 calculates the coordinate information of thefirst input position PP1 (refer to FIG. 27A) from the first digitalsignals.

The second signal processor 540 includes an amplifier, a band-passfilter, a wave detector, a sample-hold circuit, and an analog-to-digitalconverter. The second sensing signals SS2(1) to SS2(q) are converted tosecond digital signals using the second signal processor 540. Thecoordinate calculator 550 calculates the coordinate information of thesecond input position PP2 (refer to FIG. 27B) from the second digitalsignals.

FIG. 29A is a block diagram showing a touch panel driver 400T1-1according to exemplary embodiments of the present disclosure. FIG. 29Bis a block diagram showing a touch sensor 500T1-1 according to exemplaryembodiments of the present disclosure. Hereinafter, the touch paneldriver 400T1-1 and the touch sensor 500T1-1 will be described in detailwith reference to FIGS. 29A and 29B. In FIGS. 29A and 29B, the samereference numerals denote the same elements in FIGS. 28A and 28B, andthus detailed descriptions of the same elements will be omitted.

Referring to FIG. 29A, the touch panel driver 400T1-1 includes a firstscan signal output part 410T1-1 and a second scan signal output part420T1-1. The first scan signal output part 410T1-1 outputs the firstscan signals TS1(1) to TS1(k) and the second scan signal output part420T1-1 outputs the second scan signals TS2(1) to TS2(p).

The first scan signal output part 410T1-1 and the second scan signaloutput part 420T1-1 are turned on or turned off in response to the modeselection signal MSS. In the first mode, the first scan signal outputpart 410T1-1 is turned on and the second scan signal output part 420T1-1is turned off. In the second mode, the first scan signal output part410T1-1 is turned off and the second scan signal output part 420T1-1 isturned on. In the third mode, the first scan signal output part 410T1-1and the second scan signal output part 420T1-1 are turned on.

The turned-on first scan signal output part 410T1-1 sequentially outputsthe first scan signals TS1(1) to TS1(k) to the first touch electrodesTE1(1) to TE1(k). The turned-on second scan signal output part 420T1-1sequentially outputs the second scan signals TS2(1) to TS2(p) to thefirst touch coils TC1(1) to TC1(p). Accordingly, the first touchelectrodes TE1(1) to TE1(k) and the first touch coils TC1(1) to TC1(p)receive corresponding signals in the third mode.

Referring to FIG. 29B, the touch sensor 500T1-1 includes a firstselector 520T1-1, a second selector 520T1-2, a first signal processor530, a second signal processor 540, and a coordinate calculator 550.

The first selector 520T1-1 selects signals from the first sensingsignals SS1(1) to SS1(r) to pass to the first signal processor 530 andthe second selector 520T1-2 selects signals from the second sensingsignals SS2(1) to SS2(q) to pass to the second signal processor 540. Insome cases, each of the first and second selectors 520T1-1 and 520T1-2may be a multiplexer.

The first signal processor 530 converts the first sensing signals SS1(1)to SS1(r) to the first digital signals. The second signal processor 540converts the second sensing signals SS2(1) to SS2(q) to the seconddigital signals. The coordinate calculator 550 calculates the coordinateinformation of the first input position PP1 (refer to FIG. 27A) from thefirst digital signals and the coordinate information of the second inputposition PP2 (refer to FIG. 27B) from the second digital signals.

In addition, the coordinate calculator 550 may calculate the coordinateinformation from the first and second digital signals in the third mode.The coordinate calculator 550 may calculate the coordinate informationof one input position of one input device in two different ways orcalculate the coordinate information of two input positions of two inputdevices in different ways from each other.

FIG. 30 is a partially enlarged plan view showing a portion of the touchpanel TP shown in FIG. 25. FIG. 30 shows some first touch electrodes TE1of the first touch electrodes TE1(1) to TE1(k), some second touchelectrodes TE2 of the second touch electrodes TE2(1) to TE2(r), somefirst touch coils TC1 of the first touch coils TC1(1) to TC1(p), andsome second touch coils TC2 of the second touch coils TC2(1) to TC2(q).

FIGS. 31A and 31B are enlarged plan views showing a portion “AA” shownin FIG. 30. FIGS. 31A and 31B show one sensor part of the first sensorparts SP1, but the other sensor parts have the same shape shown in FIGS.31A and 31B. In addition, the second sensor parts SP2 may have the sameshape as shown in FIGS. 31A and 31B.

Referring to FIG. 31A, the first sensor part SP1 is overlapped with sometransmitting areas TA of the transmitting areas TA. The first sensorpart SP1 includes a transparent metal oxide material such that lightprovided from the backlight unit transmits through the first sensor partSP1.

Referring to FIG. 31B, the first sensor part SP1 is overlapped with aportion of the blocking area SA. The first sensor part SP1 includes aplurality of horizontal portions SP-L extended in the first directionDR1 and a plurality of vertical portion SP-C extended in the seconddirection DR2.

The horizontal portions SP-L are connected to the vertical portions SP-Cto form a plurality of openings SP-OP. In other words, the first sensorpart SP1 has a mesh shape defined by the openings SP-OP.

In this case, the first sensor part SP1 is made of a metal material witha low reflectivity. The metal material with the low reflectivityincludes chromium oxide, chromium nitride, titanium oxide, titaniumnitride, or alloys thereof.

Although not shown in figures, the first sensor part SP1 may have adouble-layer structure of the metal oxide layer shown in FIG. 31A andthe mesh type metal layer shown in FIG. 31B.

FIG. 32 is a cross-sectional view taken along a line of FIG. 30according to exemplary embodiments of the present disclosure.

Referring to FIG. 32, the first sensor part SP1 and the second sensorpart SP2 are disposed on the same layer, and the first touch coil TC1and the second touch coil TC2 are disposed on the same layer. In otherwords, the first touch electrode TE1 and the second touch electrode TE2are disposed on the same layer. The first sensor part SP1 and the secondsensor part SP2 form a portion of the first conductive layer CL1 (referto FIG. 22) and the first touch coil TC1 and the second touch coil TC2form a portion of the second conductive layer CL2 (refer to FIG. 22).

The first sensor part SP1 and the second sensor part SP2 are disposed ona surface of the first touch substrate TSS1. A first insulating layerIL-1 is disposed on the first touch substrate TSS1 to cover the firstsensor part SP1 and the second sensor part SP2. The first touch coil TC1and the second touch coil TC2 are disposed on the first insulating layerIL-1. A second insulating layer IL-2 is disposed on the first insulatinglayer IL-1 to cover the first touch coil TC1 and the second touch coilTC2. The second touch substrate TSS2 is disposed on the secondinsulating layer IL-2. In some cases, the positions of the first andsecond sensor parts SP1 and SP2 may be switched with the positions ofthe first touch coil TC1 and the second touch coil TC2.

FIG. 33 is a partially enlarged plan view showing a portion “BB” shownin FIG. 30 according to exemplary embodiments of the present disclosure.FIG. 34 is a cross-sectional view taken along a line IV-IV′ shown inFIG. 33. FIG. 35 is a partially enlarged plan view showing a portion“CC” shown in FIG. 30. FIG. 36 is a cross-sectional view taken along aline V-V shown in FIG. 35.

FIG. 33 shows an arrangement of the first connection part CP1 and thesecond connection part CP2, and FIG. 35 shows an arrangement of thefirst touch coil TC1 and the second touch coil TC2.

Referring to FIGS. 33 and 34, the first connection part CP1 includes aplurality of horizontal portions CP-L1 and CP-L2 and the secondconnection CP2 includes a plurality of vertical portions CP-C1 andCP-C2. FIG. 33 shows two horizontal portions CP-L1 and CP-L2 and twovertical portions CP-C1 and CP-C2. Although not shown in figures, thefirst connection part CP1 may further include vertical portionsoverlapped with the blocking area SA and connecting the horizontalportions CP-L1 and CP-L2. The second connection portion CP2 may furtherinclude horizontal portions overlapped with the blocking area SA andconnecting the vertical portions CP-C1 and CP-C2.

As shown in FIG. 34, the first connection part CP1 and the secondconnection part CP2 are disposed on the first touch substrate TSS1. Thefirst connection part CP1 is partially cut off on the first touchsubstrate TSS1. The first connection part CP1 includes a bridge BE1(hereinafter, referred to as a first bridge) in the area in which thefirst connection part CP1 crosses the second connection part CP2. Thefirst bridge BE1 connects two ends of the first connection part CP1 thatare partially cut off.

The first insulating layer IL-1 covers the first connection part CP1 andthe second connection part CP2. The first insulating layer IL-1 includesa third contact hole CH3 and a fourth contact hole CH4 to partiallyexpose the first connection part CP1. The third contact hole CH3 exposesone end of the first connection part CP1 that is cut off and the fourthcontact hole CH4 exposes another end of the first connection part CP1that is cut off.

The first bridge BE1 is disposed on the first insulating layer IL-1. Thefirst bridge BE1 connects the horizontal portions CP-L1 and CP-L2 of thecut-off first connection part CP1 through the third and fourth contactholes CH3 and CH4. In some cases, the second connection part CP2 may bepartially cut off on the first touch substrate TSS1, and the firstbridge BE1 may connect the cut-off second connection part CP2.

Referring to FIGS. 35 and 36, the first touch coil TC1 includes aplurality of horizontal portions TC-L1 and TC-L2, and the second touchcoil TC2 includes a plurality of vertical portions TC-C1 and TC-C2. FIG.35 shows two horizontal portions TC-L1 and TC-L2 and two verticalportions TC-C1 and TC-C2 as an example. Although not shown in figures,the first touch coil TC1 further includes vertical portions overlappedwith the blocking area SA and connecting the horizontal portions TC-L1and TC-L2, and the second touch coil TC2 further includes horizontalportions overlapped with the blocking area SA and connecting thevertical portions TC-C1 and TC-C2.

The first touch coil TC1 and the second touch coil TC2 are disposed onthe first insulating layer IL-1. The first touch coil TC1 is partiallycut off on the first insulating layer IL-1. The first touch coil TC1includes a bridge BE2 (hereinafter, referred to as a second bridge) inthe area in which the first touch coil TC1 crosses the second touch coilTC2. The second bridge BE2 connects two ends of the cut-off first touchcoil TC1.

The first insulating layer IL-1 covers the second bridge BE2. The firstinsulating layer IL-1 includes a fifth contact hole CH5 and a sixthcontact hole CH6 to partially expose the second bridge BE2. The fifthcontact hole CH5 exposes the one end of the second bridge BE2 and thesixth contact hole CH6 exposes another end of the second bridge BE2.

The one end of the cut-off first touch coil TC1 is connected to thesecond bridge BE2 through the fifth contact hole CH5 and another end ofthe cut-off first touch coil TC1 is connected to the second bridge BE2through the sixth contact hole CH6. In some cases, the second touch coilTC2 may be partially cut off on the first insulating layer IL-1, and thesecond bridge BE2 may connect the cut-off second touch coil TC2.

FIG. 37 is a cross-sectional view taken along a line shown in FIG. 30according to exemplary embodiments of the present disclosure. FIG. 38 isa partially enlarged plan view showing a portion “BB” shown in FIG. 30according to exemplary embodiments of the present disclosure. FIG. 39 isa cross-sectional view taken along a line IV-IV′ shown in FIG. 38. FIG.40 is a partially enlarged plan view showing a portion “CC” shown inFIG. 30 according to exemplary embodiments of the present disclosure.FIG. 41 is a cross-sectional view taken along a line V-V shown in FIG.40.

Referring to FIG. 37, the first sensor part SP1 and the first touch coilTC1 are disposed on the same layer, and the second sensor part SP2 andthe second touch coil TC2 are disposed on the same layer. The secondsensor part SP2 and the second touch coil TC2 form a portion of thefirst conductive layer CL1 (refer to FIG. 22) and the first sensor partSP1 and the first touch coil TC1 form a portion of the second conductivelayer CL2 (refer to FIG. 22).

The second sensor part SP2 and the second touch coil TC2 are disposed onthe first touch substrate TSS1. The first insulating layer IL-1 isdisposed on the first touch substrate TSS1 to cover the second sensorpart SP2 and the second touch coil TC2. The first sensor part SP1 andthe first touch coil TC1 are disposed on the first insulating layerIL-1. The second insulating layer IL-2 is disposed on the firstinsulating layer IL-1 to cover the first sensor part SP1 and the firsttouch coil TC1. The second touch substrate TSS2 is disposed on thesecond insulating layer IL2.

As shown in FIGS. 38 and 39, the first connection part CP1 includes thehorizontal portions CP-L1 and CP-L2, and the second connection part CP2includes the vertical portions CP-C1 and CP-C2. The second connectionportion CP2 is disposed on the first touch substrate TSS1. The firstconnection part CP1 is disposed on the first insulating layer IL-1 thatcovers the second connection part CP2. Since the first connection partSP1 and the second connection part CP2 are disposed on different layersfrom each other, the first bridge BE1 (refer to FIGS. 33 and 34) may beomitted.

As shown in FIGS. 40 and 41, the first touch coil TC1 includes thehorizontal portions TC-L1 and TC-L2, and the second touch coil TC2includes the vertical portions TC-C1 and TC-C2. The second touch coilTC2 is disposed on the first touch substrate TSS1. The first touch coilTC1 is disposed on the first insulating layer IL-1 that covers thesecond touch coil TC2. Since the first touch coil TC1 and the secondtouch coil TC2 are disposed on different layers from each other, thesecond bridge BE2 (refer to FIGS. 35 and 36) may be omitted.

FIG. 42 is a partially enlarged plan view showing a portion of the touchpanel TP shown in FIG. 25. FIG. 43 is a cross-sectional view taken alonga line shown in FIG. 42 according to exemplary embodiments of thepresent disclosure. FIG. 44 is a partially enlarged plan view showing aportion “DD” shown in FIG. 42. FIG. 42 corresponds to FIG. 30. In FIGS.42 to 44, the same reference numerals denote the same elements in FIGS.30 to 41, and thus detailed descriptions of the same elements will beomitted.

Referring to FIGS. 42 and 43, the first sensor part SP1 and the secondsensor part SP2 are disposed on the same layer, and the first touch coilTC1 and the second touch coil TC2 are disposed on the same layer. Thefirst sensor part SP1 and the second sensor part SP2 form the firstconductive layer CL1 (refer to FIG. 22) and the first touch coil TC1 andthe second touch coil TC2 form the second conductive layer CL2 (refer toFIG. 22). In some cases, the first sensor part SP1 and the second sensorpart SP2 form the second conductive layer CL2 and the first touch coilTC1 and the second touch coil TC2 form the first conductive layer CL1.

Referring to FIGS. 42 and 44, the first touch coil TC1 crosses thesecond touch coil TC2 on the second sensor part SP2. The second sensorpart SP2 is overlapped with a portion of the blocking area SA andincludes a plurality of horizontal portions SP-L and a plurality ofvertical portions SP-C. The sensor part SP2 has a mesh shape defined bya plurality of openings SP-OP. FIG. 44 shows the second sensor part SP2that is the same as the sensor part SP1 show in FIG. 31B, but it shouldnot be limited thereto or thereby.

The first touch coil TC1 includes a plurality of horizontal portionsTC-L1 and TC-L2 overlapped with the portion of the blocking area SA, andthe second touch coil TC2 includes a plurality of vertical portionsoverlapped with the portion of the blocking area SA. The second bridgeBE2 is disposed in the area in which the first touch coil TC1 crossesthe second touch coil TC2. The second bridge BE2 is disposed on the samelayer as the second sensor part SP2. The second bridge BE2 is disposedon the surface of the first touch substrate TSS1 (refer to FIG. 36).

In order to prevent the second bridge BE2 from electrically makingcontact with the second sensor part SP2, a portion of the second sensorpart SP2 is removed from the area in which the first touch coil TC1crosses the second touch coil TC2. In some cases, the first touch coilTC1 may cross the second touch coil TC2 on the first sensor part SP1.

FIGS. 45A, 45B, and 45C are enlarged plan views showing touch panels TPsaccording to exemplary embodiments of the present disclosure. FIGS. 45A,45B, and 45C show a first touch electrode TE1, a second touch electrodeTE2, a first touch coil TC1, and a second touch coil TC2. The touchpanels shown in FIGS. 45A, 45B, and 45C have the same cross-sectionalstructure as that of the touch panel TP shown in FIG. 37.

Referring to FIGS. 45A and 45B, a first sensor part SP1 of the firsttouch electrode TE1 and a second sensor part SP2 of the second touchelectrode TE2 have different shapes from each other. For example, asshown in FIG. 45A, the first sensor part SP1 and the second sensor partSP2 may have a rectangular shape and a square shape, respectively. Asshown in FIG. 45B, the first sensor part SP1 may have a hexagonal shapeand the second sensor part SP2 may have an octagonal shape. In general,the first and second sensor parts SP1 and SP2 may have various shapes,such as a circular shape, an oval shape, a polygonal shape, etc., aslong as the shape of the first sensor part SP1 is different from that ofthe second sensor part SP2.

In addition, the first touch coil TC1 includes a plurality of horizontalportions TC-L1 to TC-L4 and the second touch coil TC2 includes aplurality of vertical portions TC-C1 to TC-C4. As shown in FIGS. 45A and45B, the first touch coil TC1 includes four horizontal portions TC-L1 toTC-L4 disposed substantially in parallel to each other, and the secondtouch coil TC2 includes four vertical portions TC-C1 to TC-C4 disposedsubstantially in parallel to each other. As the number of the horizontalportions TC-L1 to TC-L4 or the vertical portions TC-C1 to TC-C4increases, an intensity of the magnetic field induced by the first touchcoil TC1 or the second touch coil TC2 becomes stronger. Thus, thesensing sensitivity of the touch panel TP becomes higher in the secondmode.

Referring to FIG. 45C, the first sensor part SP1 and the second sensorpart SP2 have a trapezoid shape. In addition, the first touch coil TC1includes two horizontal portions TC-L1 and TC-L2 and the second touchcoil TC2 includes two vertical portions TC-C1 and TC-C2.

The first touch coil TC1 further includes sub-horizontal portions TC-SL1and TC-SL2, and the second touch coil TC2 further includes sub-verticalportions TC-SC1 and TC-SC2. The sub-horizontal portions TC-SL1 andTC-SL2 and the sub-vertical portions TC-SC1 and TC-SC2 lower aresistance of the first touch coil TC1 and the second touch coil TC2,respectively.

The sub-horizontal portions TC-SL1 and TC-SL2 are disposed substantiallyin parallel to the horizontal portions TC-L1 and TC-L2, respectively,and are connected to different points of the horizontal portions TC-L1and TC-L2. The sub-horizontal portions TC-SL1 and TC-SL2 are overlappedwith the second sensor part SP2. The first sub-horizontal portion TC-SL1connects a first point and a second point of the first horizontalportion TC-L1, and the second sub-horizontal portion TC-SL2 connects afirst point and a second point of the second horizontal portion TC-L2.

The sub-vertical portions TC-SC1 and TC-SC2 are disposed substantiallyin parallel to the vertical portions TC-C1 and TC-C2, respectively, andare connected to different points of the vertical portions TC-C1 andTC-C2. The first sub-vertical portion TC-SC1 connects a first point anda second point of the first vertical portion TC-C1, and the secondsub-vertical portion TC-SC2 connects a first point and a second point ofthe second vertical portion TC-C2.

The first sub-vertical portion TC-SC1 and the second sub-verticalportion TC-SC2 do not cross the first horizontal portion TC-L1 and thesecond horizontal portion TC-L2. The first sub-horizontal portion TC-SL1and the second sub-horizontal portion TC-SL2 do not cross the firstvertical portion TC-C1 and the second vertical portion TC-C2. Verticesof the first sensor part SP1 having the trapezoid shape are disposedadjacent to an area crossing the vertical portions TC-C1 and TC-C2 andthe horizontal portions TC-L1 and TC-L2. Vertices of the second sensorpart SP2 having the trapezoid shape are disposed adjacent to an areacrossing the horizontal portions TC-L1 and TC-L2 and the horizontalportions TC-L1 and TC-L2.

Consequently, an area of the first sensor part SP1 and the second sensorpart SP2 is increased and a distance between a side of the first sensorpart SP1 and a side of the second sensor part SP2, which face eachother, is reduced. Therefore, a capacitance of the capacitor formedbetween the side of the first sensor part SP1 and the side of the secondsensor part SP2 increases, and thus the sensing sensitivity of the touchpanel TP operated in the electrostatic capacitive mode may be improved.

FIG. 46A is a plan view showing first touch electrodes TE and firsttouch coils TC according to exemplary embodiments of the presentdisclosure. FIG. 46B is a plan view showing second touch electrodes andsecond touch coils according to exemplary embodiments of the presentdisclosure. Hereinafter, the touch panel TP will be described withreference to FIGS. 46A and 46B. In FIGS. 46A and 46B, the same referencenumerals denote the same elements in FIGS. 21 to 45C, and thus detaileddescriptions of the same elements will be omitted.

Referring to FIG. 46A, each of the first touch coils TC1(1) to TC1(p)has a loop shape extended in the first direction DR1. The first touchcoils TC1(1) to TC1(p) are arranged in the second direction DR2. Thefirst touch coils TC1(1) to TC1(p) are overlapped with each other invarious ways.

Each of the first touch electrodes TE1(1) to TE1(k′) has a bar shapeextended in the first direction DR1. The first touch electrodes TE1(1)to TE1(k′) are arranged in the second direction DR2 to be spaced apartfrom each other. The first touch electrodes TE1(1) to TE1(k′) aredisposed in portions of division areas defined by overlapping the firsttouch coils TC1(1) to TC1(p) with each other.

Referring to FIG. 46B, each of the second touch coils TC2(1) to TC2(q)has a loop shape extended in the second direction DR2. The second touchcoils TC2(1) to TC2(q) are arranged in the first direction DR1. Thesecond touch coils TC2(1) to T2(q) are overlapped with each other invarious ways.

The second touch electrodes TE2(1) to TE2(r) are arranged in the firstdirection DR1 to be spaced apart from each other. The second touchelectrodes TE2(1) to TE2(r) are disposed in division areas defined byoverlapping the second touch coils TC2(1) to TC2(q) with each other.

Each of the second touch electrodes TE2(1) to TE2(r) includes secondtouch units TU2. The second touch unit TU2 includes second sensor partsSP2 arranged in the second direction DR2 and second connection parts CP2that connect two adjacent sensor parts of the second sensor parts SP2.Although not shown in figures, the first touch electrodes TE1(1) toTE1(k′) are overlapped with the connection portions CP2 of the secondtouch electrodes TE2(1) to TE2(r).

FIG. 47A is a plan view showing first touch electrodes TE1(1) to TE1(k′)and first touch coils TC1(1) to TC1(p) according to exemplaryembodiments of the present disclosure. FIG. 47B is a plan view showingsecond touch electrodes TE2(1) to TE2(r) and second touch coils TC2(1)to TC2(q) according to exemplary embodiments of the present disclosure.In FIGS. 47A and 47B, the same reference numerals denote the sameelements in FIGS. 21 to 45C, and thus detailed descriptions of the sameelements will be omitted.

Referring to FIG. 47A, each of the first touch coils TC1(1) to TC1(p)has a loop shape extended in the first direction DR1. The first touchcoils TC1(1) to TC1(p) are arranged in the second direction DR2. Thefirst touch coils TC1(1) to TC1(p) may be overlapped with each other invarious ways. The first touch coils TC1(1) to TC1(p) are partiallyoverlapped with each other in groups, e.g., three touch coils.

Each of the first touch electrodes TE1(1) to TE1(k) has a bar shapeextended in the first direction DR1. The first touch electrodes TE1(1)to TE1(k) are arranged in the second direction DR2 to be spaced apartfrom each other.

The first touch electrodes TE1(1) to TE1(k) are disposed in divisionareas defined by overlapping the first touch coils with each other.

Referring to FIG. 47B, each of the second touch coils TC2(1) to TC2(q)has a loop shape extended in the second direction DR2. The second touchcoils TC2(1) to TC2(q) are arranged in the first direction DR1. Thesecond touch coils TC2(1) to TC2(q) may be overlapped with each other invarious ways. The second touch coils TC2(1) to TC2(q) are partiallyoverlapped with each other in groups, e.g., three touch coils.

Each of the second touch electrodes TE2(1) to TE2(r) has a bar shapeextended in the second direction DR2. The second touch electrodes TE2(1)to TE2(r) are arranged in the first direction DR1 to be spaced apartfrom each other. The second touch electrodes TE2(1) to TE2(r) aredisposed in division areas defined by overlapping the second touch coilswith each other.

FIG. 48 is a plan view showing a touch panel TP according to exemplaryembodiments of the present disclosure. In FIG. 48, the same referencenumerals denote the same elements in FIGS. 21 to 45B, and thus detaileddescriptions of the same elements will be omitted.

Referring to FIG. 48, each of the first touch coils TC1(1) to TC1(p) hasa loop shape extended in the first direction DR1. The first touch coilsTC1(1) to TC1(p) are arranged in the second direction DR2. Each of thesecond touch coils TC2(1) to TC2(q) has a loop shape extended in thesecond direction DR2. The second touch coils TC2(1) to TC2(q) arearranged in the first direction DR1.

The first touch electrodes TE1(1) to TE1(k) cross the second touchelectrodes TE2(1) to TE2(r). The first touch electrodes TE1(1) to TE1(k)and the second touch electrodes TE2(1) to TE2(r) have a bar shape, butthe shape of the first touch electrodes TE1(1) to TE1(k) and the secondtouch electrodes TE2(1) to TE2(r) should not be limited to the barshape.

The first touch coils TC1(1) to TC1(p) are not overlapped with eachother and the second touch coils TC2(1) to TC2(q) are not overlappedwith each other. Each of the first touch electrodes TE1(1) to TE1(k) isdisposed in an area in which a corresponding touch coil of the firsttouch coils TC1(1) to TC1(p) is formed. For instance, each of the firsttouch electrodes TE1(1) to TE1(k) is surrounded by the correspondingtouch coil of the first touch coils TC1(1) to TC1(p). Each of the secondtouch electrode TE2(1) to TE2(r) is disposed in an area in which acorresponding touch coil of the second touch coils TC2(1) to TC2(q) isformed. Each of the second touch electrode TE2(1) to TE2(r) issurrounded by the corresponding touch coil of the second touch coilsTC2(1) to TC2(q).

FIGS. 49A and 49B are cross-sectional views showing a touch panel TP10according to exemplary embodiments of the present disclosure.Hereinafter, the touch panel TP10 will be described in detail withreference to FIGS. 49A and 49B. In FIGS. 49A and 49B, the referencenumerals denote the same elements in FIGS. 21 to 48, and thus detaileddescriptions of the same elements will be omitted.

Referring to FIG. 49A, the first display substrate DS1 is disposed underthe liquid crystal layer LCL and the second display substrate DS2 isdisposed on the liquid crystal layer LCL. The touch panel TP10 isdisposed on the second display substrate DS2.

The touch panel TP10 includes a first conductive layer CL1, aninsulating layer IL, a second conductive layer CL2, and a touchsubstrate TSS, which corresponds to the second touch substrate TSS2shown in FIG. 23A. The first conductive layer CL1 is disposed on anupper surface of the second display substrate DS2. Different from atouch panel attached to a display panel after being separatelymanufactured, the touch panel TP10 is directly formed on the uppersurface of the second display substrate DS2. After the first conductivelayer CL1 is formed on the upper surface of the second display substrateDS2, the insulating layer IL, the second conductive layer CL2, and thetouch substrate TSS are sequentially stacked.

Each of the first conductive layer CL1 and the second conductive layerCL2 includes a plurality of conductive patterns. As described withreference to FIGS. 21 to 48, the first conductive layer CL1 includesportions of the first touch electrodes TE1(1) to TE1(k), the secondtouch electrodes TE2(1) to TE2(r), the first touch coils TC1(1) toTC1(p), and the second touch coils TC2(1) to TC2(q), and the secondconductive layer CL2 includes the other portions of the first touchelectrodes TE1(1) to TE1(k), the second touch electrodes TE2(1) toTE2(r), the first touch coils TC1(1) to TC1(p), and the second touchcoils TC2(1) to TC2(q).

Referring to FIG. 49B, the first display substrate DS1 is disposed onthe liquid crystal layer LCL, and the second display substrate DS2 isdisposed under the liquid crystal layer LCL. The touch panel TP10 isdisposed on the first display substrate DS1. In some cases, the touchpanel TP10 may have the same configuration as that of the touch panelshown in FIG. 29A.

FIGS. 50A and 50B are cross-sectional views showing a touch panel TP20according to exemplary embodiments of the present disclosure.Hereinafter, the touch panel TP20 will be described in detail withreference to FIGS. 50A and 50B. In FIGS. 50A and 50B, the same referencenumerals denote the same elements in FIGS. 21 to 48, and thus thedetailed descriptions of the same elements will be omitted.

Referring to FIG. 50A, the first display substrate DS1 is disposed underthe liquid crystal layer LCL, and the second display substrate DS2 isdisposed on the liquid crystal layer LCL. The first display substrateDS1 includes a first base substrate SUB1, a plurality of insulatinglayers 10 and 20, and pixels PX. The second display substrate DS2includes a second base substrate SUB2, a black matrix BM and colorfilters CF.

The touch panel TP20 includes a first conductive layer CL1, a secondconductive layer CL2, and a touch substrate TSS, which corresponds tothe second touch substrate TSS2 shown in FIG. 23A. The first conductivelayer CL1 is disposed on a lower surface of the second base substrateSUB2. The black matrix BM and the color filters CF are disposed on thelower surface of the second base substrate SUB2 to cover the firstconductive layer CL1. In some cases, the first conductive layer CL1 maybe disposed on the black matrix BM and the color filters CF, which aredisposed on the lower surface of the second base substrate SUB2.

The second conductive layer CL2 is disposed on the upper surface of thesecond base substrate SUB2. The second base substrate SUB2 has aninsulating function to insulate the first conductive layer CL1 from thesecond conductive layer CL2.

The touch substrate TSS is disposed on the second conductive layer CL2.In some cases, the touch panel TP20 may further include an insulatinglayer disposed between the second conductive layer CL2 and the touchsubstrate TSS.

Referring to FIG. 50B, the first display substrate DS1 is disposed onthe liquid crystal layer LCL, and the second display substrate DS2 isdisposed under the liquid crystal layer LCL. In some cases, the touchpanel TP20 may have the same configuration as that of the touch panelshown in FIG. 50A.

The first conductive layer CL1 is disposed on the lower surface of thefirst base substrate SUB1. An insulating layer 5 is disposed on thelower surface of the first base substrate SUB1 to cover the firstconductive layer CL1, and a common electrode is disposed on theinsulating layer 5.

The second conductive layer CL2 is disposed on the upper surface of thefirst base substrate SUB1. The touch substrate TSS is disposed on thesecond conductive layer CL2. In some cases, the insulating layer 5 maybe replaced with the black matrix BM and the color filters CF.

FIG. 51 is a cross-sectional view showing a display device according toexemplary embodiments of the present disclosure. FIGS. 52A and 52E arecross-sectional views showing a touch panel according to exemplaryembodiments of the present disclosure. Hereinafter, the touch panel willbe described in detail with reference to FIGS. 51 and 52A to 52E. InFIGS. 51 and 52A to 52E, the same reference numerals denote the sameelements in FIGS. 1 to 28, and thus detailed descriptions of the sameelements will be omitted.

Referring to FIG. 51, the first display substrate DS1 is disposed underthe liquid crystal layer LCL, and the second display substrate DS2 isdisposed on the liquid crystal layer LCL. The first display substrateDS1 includes a first base substrate SUB1, a plurality of insulatinglayers 10 and 20, and pixels PX. The second display substrate DS2includes a second base substrate SUB2, a black matrix BM, and colorfilters CF.

The touch panel TP30 includes a first conductive layer CL1, aninsulating layer IL, and a second conductive layer CL2. The firstconductive layer CL1, the insulating layer IL, and the second conductivelayer CL2 are disposed on the lower surface of the second base substrateSUB2. For instance, the first conductive layer CL1 is disposed on thelower surface of the second base substrate SUB2, the insulating layer ILis disposed on the first conductive layer CL1, and the second conductivelayer CL2 is disposed on the insulating layer IL.

FIGS. 52A to 52E show various layer structures with reference to theconductive pattern shown in FIG. 31B.

Referring to FIG. 52A, the black matrix BM and the color filters CF aredisposed on the lower surface of the second base substrate SUB2. Thefirst insulating layer IL-1 is disposed on the black matrix BM and thecolor filters CF to planarize an upper surface of the black matrix BMand the color filters CF. The first conductive layer CL1 is disposed onthe first insulating layer IL-1. The second insulating layer IL-2 isdisposed on the first insulating layer IL-1 to cover the firstconductive layer CL1.

The second conductive layer CL2 is disposed on the second insulatinglayer IL-2. The third insulating layer IL-3 is disposed on the secondinsulating layer IL-2 to cover the second conductive layer CL2. Thethird and fourth contact holes CH3 and CH4 described with reference toFIG. 34 and the fifth and sixth contact holes CH5 and CH6 described withreference to FIG. 36 are formed through the second insulating layerIL-2. The third insulating layer IL-3 may be omitted.

Referring to FIG. 52B, the black matrix BM and the color filters CF aredisposed on the lower surface of the second base substrate SUB2. Thecolor filters CF are disposed to overlap with the black matrix BM andopenings BM-OP formed through the black matrix BM. The first conductivelayer CL1 is disposed on a surface of the color filters CF.

A first insulating layer IL-10 is disposed on the surface of the colorfilters CF to cover the first conductive layer CL1. The secondconductive layer CL2 is disposed on the first insulating layer IL-10. Asecond insulating layer IL-20 is disposed on the first insulating layerIL-10 to cover the second conductive layer CL2. The third and fourthcontact holes CH3 and CH4 described with reference to FIG. 34 and thefifth and sixth contact holes CH5 and CH6 described with reference toFIG. 36 are formed through the first insulating layer IL-10.

Referring to FIG. 52C, the black matrix BM is disposed on the lowersurface of the second base substrate SUB2. The first conductive layerCL1 is disposed on the black matrix BM. The first insulating layer IL-1is disposed on the lower surface of the second base substrate SUB2 tocover the black matrix BM and the first conductive layer CL1.

The second conductive layer CL2 is disposed on the first insulatinglayer IL-1. The second insulating layer IL-2 is disposed on the firstinsulating layer IL-1 to cover the second conductive layer CL2. Thecolor filters CF are disposed on the second insulating layer IL-2 tooverlap with the black matrix BM and the openings BM-OP formed throughthe black matrix BM. The color filters CF are disposed to allow aboundary between the color filters CF to overlap with the black matrixBM. The third insulating layer IL-3 is disposed on the color filters CF.

The third and fourth contact holes CH3 and CH4 described with referenceto FIG. 34 and the fifth and sixth contact holes CH5 and CH6 describedwith reference to FIG. 36 are formed through the first insulating layerIL-1. In some cases, the second insulating layer IL-2 may be omitted andthe second conductive layer CL2 may be covered by the color filters CF.

Referring to FIG. 52D, the black matrix BM is disposed on the lowersurface of the second base substrate SUB2. The first conductive layerCL1 is disposed on the black matrix BM. The color filters CF aredisposed on the lower surface of the second base substrate SUB2 tooverlap with the black matrix BM and the openings BM-OP formed throughthe black matrix BM and to cover the first conductive layer CL1.

The first insulating layer IL-1 is disposed on the color filters CF. Thefirst insulating layer IL-1 provides a flat surface thereon. The secondconductive layer CL2 is disposed on the first insulating layer IL-1. Thesecond insulating layer IL-2 is disposed on the first insulating layerIL-1 to cover the second conductive layer CL2.

The third and fourth contact holes CH3 and CH4 described with referenceto FIG. 34 and the fifth and sixth contact holes CH5 and CH6 describedwith reference to FIG. 36 are formed through the color filters CF andthe first insulating layer IL-10. In some cases, the first insulatinglayer IL-1 may be omitted and the second conductive layer CL2 may bedisposed on the surface of the color filters CF.

Referring to FIG. 52E, the black matrix BM is disposed on the lowersurface of the second base substrate SUB2. The first insulating layerIL-1 is disposed on the lower surface of the second base substrate SUB2to cover the black matrix BM. The first conductive layer CL1 is disposedon the first insulating layer IL-1. The first conductive layer CL1 maybe overlapped with the black matrix BM. The color filters CF aredisposed on the first insulating layer IL-1 to cover the firstconductive layer CL1.

The second insulating layer IL-2 is disposed on the color filters CF.The second insulating layer IL-2 provides a flat surface thereon. Thesecond conductive layer CL2 is disposed on the second insulating layerIL-2. The third insulating layer IL-3 is disposed on the secondinsulating layer IL-2 to cover the second conductive layer CL2.

The third and fourth contact holes CH3 and CH4 described with referenceto FIG. 34 and the fifth and sixth contact holes CH5 and CH6 describedwith reference to FIG. 36 are formed through the color filters CF andthe second insulating layer IL-2. In some cases, the second insulatinglayer IL-2 may be omitted and the second conductive layer CL2 may bedisposed on the surface of the color filters CF.

FIG. 53 is a cross-sectional view showing a display device according toexemplary embodiments of the present disclosure. Hereinafter, the touchpanel TP30 will be described with reference to FIG. 53. In FIG. 53, thesame reference numerals denote the same elements in FIGS. 21 to 48, andthus detailed descriptions of the same elements will be omitted.

Referring to FIG. 53, the first display substrate DS1 is disposed on theliquid crystal layer LCL, and the second display substrate DS2 isdisposed under the liquid crystal layer LCL. The first display substrateDS1 includes a first base substrate SUB1, and a plurality of insulatinglayers 10 and 20, pixels PX. The second display substrate SUB2 includesa second base substrate SUB2, a black matrix BM, and color filters CF.

The touch panel TP30 includes a first conductive layer CL1, aninsulating layer IL, and a second conductive layer CL2. The firstconductive layer CL1, the insulating layer IL, and the second conductivelayer CL2 are disposed on a lower surface of the first base substrateSUB1.

The first conductive layer CL1 is disposed on the lower surface of thefirst base substrate SUB1, the insulating layer IL is disposed on thefirst conductive layer CL1, and the second conductive layer CL2 isdisposed on the insulating layer IL. An additional insulating layer 5 isdisposed on the second conductive layer CL2. The pixels PX are disposedon the insulating layer 5.

The third and fourth contact holes CH3 and CH4 described with referenceto FIG. 34 and the fifth and sixth contact holes CH5 and CH6 describedwith reference to FIG. 36 are formed through the insulating layer IL.

FIG. 54 is a cross-sectional view showing a display device according toexemplary embodiments of the present disclosure. Hereinafter, the touchpanel TP40 will be described with reference to FIG. 54. In FIG. 54, thesame reference numerals denote the same elements in FIGS. 21 to 48, andthus detailed descriptions of the same elements will be omitted.

Referring to FIG. 54, the first display substrate DS1 is disposed on theliquid crystal layer LCL, and the second display substrate DS2 isdisposed under the liquid crystal layer LCL. The first display substrateDS1 includes a first base substrate SUB1, a black matrix BM, colorfilters CF, a plurality of insulating layers 10 and 20, and pixels PX.The second display substrate SUB2 includes a second base substrate SUB2.

The touch panel TP40 includes a first conductive layer CL1 and a secondconductive layer CL2. The first conductive layer CL1 and the secondconductive layer CL2 are disposed on a lower surface of the first basesubstrate SUB1.

The first conductive layer CL1 is disposed on the lower surface of thefirst base substrate SUB1, the black matrix BM and the color filters CFare disposed on the first conductive layer CL1, and the secondconductive layer CL2 is disposed on the black matrix BM and the colorfilters CF. An insulating layer 5 is disposed on the second conductivelayer CL2. The pixels PX are disposed on the insulating layer 5.

The third and fourth contact holes CH3 and CH4 described with referenceto FIG. 34, and the fifth and sixth contact holes CH5 and CH6 describedwith reference to FIG. 36 are formed through the black matrix BM and/orthe color filters CF.

FIG. 55 is a block diagram showing a display device according toexemplary embodiments of the present disclosure. FIG. 56 is a partialperspective view showing the display device shown in FIG. 55. FIG. 57 isa cross-sectional view taken along a line I-I′ shown in FIG. 56. FIG. 58is a plan view showing a touch panel according to exemplary embodimentsof the present disclosure.

Referring to FIG. 55, the display device includes a display panel DP, asignal controller 100, a gate driver 200, a data driver 300, and a touchpanel TP. The signal controller 100, the gate driver 200, and the datadriver 300 control the display panel DP to display an image. Althoughnot shown in figures, the display device further includes a touch paneldriver to drive the touch panel TP and a touch sensor to calculatecoordinate information of an input position.

The display panel DP, the signal controller 100, the gate driver 200,the data driver 300, and the touch panel TP have the same configurationand function as the configuration and function of the display devicedescribed with reference to FIGS. 21 to 54. Therefore, hereinafter adifference between the display device described with reference to FIGS.55 to 58 and the display device described with reference to FIGS. 21 to54 will be described.

Referring to FIGS. 55 to 58, the display panel DP includes display areasDA1 and DA2 in which the image is displayed and a non-display area (notshown) in which the image is not displayed. The display areas DA1 andDA2 include a first display area DA1 and a second display area DA2arranged in the second direction DR2. The non-display area surrounds thedisplay areas DA1 and DA2, and terminals of gate lines GL1 to GLn andterminals of data lines DL1 to DLm are disposed in the non-display area.

The signal controller 100 outputs a selection signal SS to control thetouch panel TP. The touch panel TP includes a first touch part TPP1 anda second touch part TPP2, which sense the touch event in different ways.Each of the first and second touch parts TPP1 and TPP2 is partiallyturned off in response to the selection signal SS.

At a specific time point during a frame period in which the image isdisplayed, the first touch part TPP1 overlapped with the first displayarea DA1 is turned off and the second touch part TPP2 overlapped withthe first display area DA1 is turned on. In this case, the first touchpart TPP1 overlapped with the second display area DA2 is turned on andthe second touch part TPP2 overlapped with the second display area DA2is turned off. In addition, at a different time point from the specifictime point, the first touch part TPP1 overlapped with the first displayarea DA1 is turned on and the second touch part TPP2 overlapped with thefirst display area DA1 is turned off. In this case, the first touch partTPP1 overlapped with the second display area DA2 is turned off and thesecond touch part TPP2 overlapped with the second display area DA2 isturned on.

Referring to FIG. 56, the display panel DP includes a first displaysubstrate DS1 and a second display substrate DS2 disposed to be spacedapart from the first display substrate DS1. A liquid crystal layer LCLis disposed between the first display substrate DS1 and the seconddisplay substrate DS2. The gate lines GL1 to GLn (refer to FIG. 1), thedata lines DL1 to DLm (refer to FIG. 1), and the pixels PX11 to PXnm(refer to FIG. 1) are disposed on one of the first display substrate DS1or the second display substrate DS2. Hereinafter, the first displaysubstrate DS1 will be described with the assumption that the gate linesGL1 to GLn, the data lines DL1 to DLm, and the pixels PX11 to PXnm aredisposed on the first display substrate DS1.

Each of the first display area DA1 and the second display area DA2includes a plurality of transmitting areas TA and a blocking area SA.The transmitting areas TA transmit light generated by and provided fromthe backlight unit and the blocking area SA blocks the light. Theblocking area SA surrounds the transmitting areas TA.

The touch panel TP is disposed on the display panel DP. The touch panelTP may be attached to the upper surface of the first display substrateDS1. The touch panel TP includes a first touch substrate TSS1, the firsttouch part TPP1, an insulating layer IL, the second touch part TPP2, anda second touch substrate TSS2.

The first touch part TPP1 includes the first touch coils TC1(1) toTC1(p) and the second touch coils TC2(1) to TC2(q). The second touchpart TPP2 includes the first touch electrodes TE1(1) to TE1(k) and thesecond touch electrodes TE2(1) to TE2(r). The first touch part TPP1 isdisposed under the second touch part TPP2.

The first touch coils TC1(1) to TC1(p) are insulated from the secondtouch coils TC2(1) to TC2(q). Each of the first touch coils TC1(1) toTC1(p) has a loop shape extended in the first direction DR1. The firsttouch coils TC1(1) to TC1(p) are arranged in the second direction DR2.The first touch coils TC1(1) to TC1(p) and the second touch coils TC2(1)to TC2(q) are disposed on the same layer and insulated from each otherby the bridge BE2 (refer to FIGS. 35 and 36) disposed at crossing areasof the first touch coils TC1(1) to TC1(p) and the second touch coilsTC2(1) to TC2(q).

The first touch electrodes TE1(1) to TE1(k) are insulated from thesecond touch electrodes TE2(1) to TE2(r). Each of the first touchelectrodes TE1(1) to TE1(k) is extended in the first direction DR1. Thefirst touch electrodes TE1(1) to TE1(k) are arranged in the seconddirection DR2 to be spaced apart from each other. Each of the firsttouch electrodes TE1(1) to TE1(k) includes a plurality of sensor partsSP1 (hereinafter, referred to as first sensor parts) and a plurality ofconnection parts CP1 (hereinafter, referred to as first connectionparts).

Each of the second touch electrodes TE2(1) to TE2(r) is extended in thesecond direction DR2. The second touch electrodes TE2(1) to TE2(r) arearranged in the first direction DR1 to be spaced apart from each other.Each of the second touch electrodes TE2(1) to TE2(r) includes aplurality of sensor parts SP2 (hereinafter, referred to as second sensorparts) and a plurality of connection parts CP2 (hereinafter, referred toas second connection parts).

FIG. 59A is a plan view showing the first touch part TPP1 shown in FIG.58 and FIG. 59B is a plan view showing the second touch part TPP2 shownin FIG. 58. Operations of the first and second touch parts TPP1 and TPP2will be described in detail with reference to FIGS. 59A and 59B.

The first touch coils TC1(1) to TC1(p) receive scan signals TS10(1) toTS10(p) (hereinafter, referred to first scan signals), which areactivated in different periods from each other. The first scan signalsTS10(1) to TS10(p) are the same or similar signals as the second scansignals TS2(1) to TS2(p) shown in FIG. 27B.

Each of the first touch coils TC1(1) to TC1(p) generates a magneticfield in response to a corresponding scan signal of the first scansignals TS10(1) to TS10(p). When the input device (not shown) approachesto the first touch coils TC1(1) to TC1(p), the magnetic field inducedfrom the first touch coils TC1(1) to TC1(p) resonates with the resonantcircuit of the input device. Thus, the input device causes generation ofthe resonant frequency. The input device may be, but is not limited to,a stylus pen with an inductor-capacitor (LC) resonant circuit. Thesecond touch coils TC2(1) to TC2(q) output sensing signals SS10(1) toSS10(q) (hereinafter, referred to as first sensing signals) according tothe resonant frequency of the input device.

A center area in which the second first touch coil TC1(2) of the firsttouch coils TC1(1) to TC1(p) crosses the second touch coil TC2(2) of thesecond touch coils TC2(1) to TC2(q) is referred to as the input positionPP1 (hereinafter, referred to as a first input position).

The first sensing signal SS10(2) output from the second touch coilTC2(2) has a level higher than that of the first sensing signalsSS10(1), and SS10(3) to SS10(q) output from other second touch coilsTC2(1) and TC2(3) to TC2(q).

The two-dimensional coordinate information of the first input positionPP1 is calculated on the basis of the time at which the first sensingsignal SS10(2) having the relatively high level is sensed and therelative position of the second touch coil TC2(2) with respect to thesecond touch coils TC2(1) to TC2(q).

Hereinafter, the operation of the second touch part TTP2 will bedescribed with reference to FIG. 59B. The first touch electrodes TE1(1)to TE1(k) correspond to input touch electrodes of the electrostaticcapacitive type touch panel and the second touch electrodes TE2(1) toTE2(r) correspond to output touch electrodes of the electrostaticcapacitive type touch panel.

The first touch electrodes TE1(1) to TE1(k) are capacitive-coupled tothe second touch electrodes TE2(1) to TE2(r). When scan signals TS20(1)to TS20(k) (hereinafter, referred to as second scan signals) are appliedto the first touch electrodes TE1(1) to TE1(k), capacitors are formedbetween the first sensor parts SP1 and the second sensor parts SP2. Thesecond scan signals TS20(1) to TS20(k) are the same signals as the firstscan signals TS1(1) to TS1(k) shown in FIG. 27A.

The first touch electrodes TE1(1) to TE1(k) sequentially receive thesecond scan signals TS20(1) to TS20(k). The second scan signals TS20(1)to TS20(k) are activated in different periods from each other. Thesecond touch electrodes TE2(1) to TE2(r) output sensing signals SS20(1)to SS20(r) (hereinafter, referred to as second sensing signals)generated from the second scan signals TS20(1) to TS20(k).

An area in which the second first touch electrode TE1(2) of the firsttouch electrodes TE1(1) to TE1(k) crosses the second touch electrodeTE2(2) of the second touch electrodes TE2(1) to TE2(r) is referred to asthe input position PP2 (hereinafter, referred to as a second inputposition). Here, the second input position PP2 may be generated by aninput device, e.g., user's finger.

The second sensing signal SS20(2) output from the second touch electrodeTE2(2) of the second touch electrodes TE2(1) to TE2(r) has a leveldifferent from that of the second sensing signals SS20(1), and SS20(3)to SS20(r) output from other second touch electrodes TE2(1) and TE2(3)to TE2(r).

The coordinate information in the second direction DR2 of the secondinput position PP2 is calculated on the basis of the time at which thesecond sensing signal SS20(2) having the different level is sensed, andthe coordinate information in the first direction DR1 of the secondinput position PP2 is calculated on the basis of the relative positionof the second second touch electrode TE2(2) with respect to the secondtouch electrodes TE2(1) to TE2(r).

FIG. 60 is a timing diagram showing signals applied to a display deviceaccording to exemplary embodiments of the present disclosure. FIG. 61Ais a block diagram showing a touch panel driver 400T2 according toexemplary embodiments of the present disclosure. FIG. 61B is a blockdiagram showing a touch sensor 500T2 according to exemplary embodimentsof the present disclosure. FIGS. 62A and 62B are timing diagrams showingscan signals according to exemplary embodiments of the presentdisclosure.

Referring to FIG. 60, a vertical synchronizing signal Vsync definesframe periods FRn−1, FRn, and FRn+1. The frame periods FRn−1, FRn, andFRn+1 may include a display period DSP and a non-display period BP. Datavoltages V_(RGB) are not output during the non-display period BP, andthus the non-display period BP may be omitted. A horizontalsynchronizing signal Hsync defines horizontal periods included in thedisplay periods DSP. The data driver 300 outputs the data voltagesV_(RGB) every horizontal period.

During each frame period FRn−1, FRn, and FRn+1, gate signals GSS1 toGSSn are sequentially applied to the gate lines GL1 to GLn. The gatesignals GSS1 to GSSn serve as pulse signals activated in differentperiods from each other. Thus, the pixels PX11 to PXnm are turned on inthe unit of pixel row. The data voltages V_(RGB) are applied to thepixels in the unit of pixel row and substantially and simultaneouslyapplied to the pixels included in the same pixel row. The first displayarea DA1 and the second display area DA2 generate the image during eachframe period FRn−1, FRn, and FRn+1 in a line-by-line scanning mode.

During a portion F-1 (hereinafter, referred to as a first period) ofeach frame period FRn−1, FRn, and FRn+1, the selection signal SS mayhave a high level, and the selection signal SS may have a low levelduring another portion F-2 (hereinafter, referred to as a second period)of each frame period FRn−1, FRn, and FRn+1. Responsive to the selectionsignal SS, each of the first touch part TPP1 (refer to FIG. 59A) and thesecond touch part TPP2 (refer to FIG. 59B) is partially turned off.

As shown in FIG. 61A, the touch panel driver 400T2 includes a first scansignal output part 410T2 and a second scan signal output part 420T2.During each frame period FRn−1, FRn, and FRn+1, the first scan signaloutput part 410T2 outputs first scan signals TS10(10) to TS10(p) and thesecond scan signal output part 420T2 outputs second scan signals TS20(1)to TS20(k).

Referring to FIG. 61B, the touch sensor 500T2 includes a first selector510, a second selector 520, a first signal processor 530, a secondsignal processor 540, and a coordinate calculator 550.

The first selector 510 selects one of the first sensing signals SS10(1)to SS10(q) to apply to the first signal processor 530, and the secondselector 520 selects one of the second sensing signals SS20(1) toSS20(r) to apply to the second signal processor 540. Each of the firstand second selectors 510 and 520 may be, but is not limited to, amultiplexor.

The first signal processor 530 converts the first sensing signalsSS10(1) to SS10(q) to first digital signals. The second signal processor540 converts the second sensing signals SS20(1) to SS20(r) to seconddigital signals. The coordinate calculator 550 calculates the coordinateinformation of the first input position PP1 (refer to FIG. 59A) from thefirst digital signals, and calculates the coordinate information of thesecond input position PP2 (refer to FIG. 59B) from the second digitalsignals.

Referring to FIG. 62A, the first scan signal output part 410T2 outputsportions of the first scan signals, which are different from each other,during the first period F-1 and the second period F-2 in response to theselection signal SS.

The first touch coils TC1(1) to TC1(p) (refer to FIG. 59A) are dividedinto a first group of first touch coils disposed to overlap with thefirst display area DA1 (refer to FIGS. 55 and 60) and a second group offirst touch coils disposed to overlap with the second display area DA2(refer to FIGS. 55 and 60). The first scan signal output part 410T2sequentially applies the corresponding first scan signals DA2-TS10 toonly the second group of first touch coils during the first period F-1.The first scan signal output part 410T2 sequentially applies thecorresponding first scan signals DA1-TS10 to only the first group offirst touch coils during the second period F-2.

Referring to FIG. 62B, the first scan signal output part 410T2 may applythe corresponding first scan signals DA2-TS10 to only the second groupof first touch coils during the first period F-1 in plural times, e.g.,two times. When the second display area DA2 is scanned several times,the touch sensitivity is improved. In addition, the first scan signaloutput part 410T2 may apply the corresponding first scan signalsDA2-TS20 to only the first group of first touch coils during the secondperiod F-2 in two times.

As shown in FIG. 62A, the second scan signal output part 420T2 outputsportions of the second scan signals, which are different from eachother, during the first period F-1 and the second period F-2 in responseto the selection signal SS. The first touch electrodes TE1(1) to TE1(k)(refer to FIG. 59B) are divided into a first group of first touchelectrodes disposed to overlap with the first display area DA1 (refer toFIGS. 55 and 60) and a second group of first touch electrodes disposedto overlap with the second display area DA2 (refer to FIGS. 55 and 60).

The second scan signal output part 420T2 sequentially applies thecorresponding second scan signals DA1-TS20 to only the first group offirst touch electrodes during the first period F-1. The second scansignal output part 420T2 sequentially applies the corresponding firstscan signals DA2-TS20 to only the second group of first touch electrodesduring the second period F-2.

Referring to FIG. 62B, the second scan signal output part 420T2 may scantwo times the first group of first touch electrodes during the firstperiod F-1. The second scan signal output part 420T2 may scan two timesthe second group of first touch electrodes during the second period F-2.

As described with reference to FIGS. 60, 61A, 61B, 62A, and 62B, thetouch event occurring in the first display area DA1 during the firstperiod F-1 is sensed by the second touch part TPP2, and the touch eventoccurring in the second display area DA2 during the first period F-1 issensed by the first touch part TPP1. During the second period F-2, thetouch event occurring in the first display area DA is sensed by thefirst touch part TPP1 and the touch event occurring in the seconddisplay area DA2 is sensed by the second touch part TPP2.

As described above, since the first touch part TPP1 and the second touchpart TPP2 are individually operated in accordance with the first andsecond periods F-1 and F-2 and the first and second display areas DA1and DA2, the noise induced to the display panel DP or the first touchpart TPP1 may be removed.

FIG. 63 is an equivalent diagram showing a path through which noise isgenerated, which exerts an influence on a second touch sensor. FIGS. 64Aand 64B are graphs showing a relation between the noise and thedetection signal. FIG. 65 is an equivalent diagram showing a paththrough which a noise is removed in a display device according toexemplary embodiments of the present disclosure.

FIG. 63 shows an equivalent circuit diagram of the second touch partTPP2 (refer to FIG. 59B) including the first touch electrodes TE1(1) toTE1(k) and the second touch electrodes TE2(1) to TE2(r). In addition,FIG. 63 shows a path of noise NP that exerts an influence on the secondtouch part TPP2. A first resistor Rtx denotes an equivalent resistanceof the first touch electrodes TE1(1) to TE1(k) and a second resistor Rrxdenotes an equivalent resistance of the second touch electrodes TE2(1)to TE2(r).

A variable capacitor Cm is formed between the first touch electrodesTE1(1) to TE1(k) and the second touch electrodes TE2(1) to TE2(r). Anamount of charges charged in the variable capacitor Cm is changed by thesecond scan signals TS20, which correspond to the second scan signalsTS20(1) to TS20(k) shown in FIG. 59B. The variation amount of chargescharged in the variable capacitor Cm may be calculated from the level ofthe second sensing signal SS20, which correspond to the second sensingsignals SS20(1) to SS20(r) shown in FIG. 59B.

A first noise NVcom is generated by the common electrode in which anelectric potential thereof is influenced by the pixel voltage. A secondnoise NTS10 is generated by the first scan signals TS10(1) to TS10(p)applied to the first touch coils TC1(1) to TC1(p) of the first touchpart TPP1.

The first noise NVcom and the second noise NTS10 exerts an influence tothe second touch part TPP2 through a first parasitic capacitor PCtxgenerated between the first touch electrodes TE1(1) to TE1(k), and thefirst touch coils TC1(1) to TC1(p) and a second parasitic capacitor PCrxgenerated between the second touch electrodes TE2(1) to TE2(r) and thefirst touch coils TC1(1) to TC1(p).

FIGS. 64A and 64B show a noise signal and a second sensing signal SS20,respectively. The noise signal NS is generated by at least one of thefirst noise NVcom or the second noise NTS10.

As shown in FIG. 64A, when the noise signal NS and the second sensingsignal SS20 are overlapped with each other, the second sensing signalSS20 may not be identified. When the level of the noise signal NS is notoverlapped with the second sensing signal SS20 and is similar to thesecond sensing signal SS20, as shown in FIG. 64B, the noise signal NSmay be misidentified as the second sensing signal SS20. As describedabove, when the first noise NVcom and the second noise NTS10 aregenerated, the touch sensitivity of the second touch part TPP2 isdeteriorated.

FIG. 65 shows an equivalent circuit diagram of the first display areaDA1 represented during the first period F-1 (refer to FIG. 60). Inparticular, a pixel row corresponding to a fifth gate line GL5 has beenshown in FIG. 65 as a representative example. The pixel rowcorresponding to the fifth gate line GL5 includes pixels PX51 to PX5 j.Each of the pixels PX51 to PX5 j includes a thin film transistor TFT anda liquid crystal capacitor Cliq. The liquid crystal capacitor Cliqincludes a pixel electrode, a common electrode, and a liquid crystallayer disposed between the pixel electrode and the common electrode.

A third parasitic capacitor PCe is generated between the first touchcoils TC1(1) to TC1(p) and the common electrode. The third resistor Rcomrepresents an equivalent resistance of the common electrode. The fourthresistor Re represents an equivalent resistance of the first touch coilsTC1(1) to TC1(p).

During the first period F-1 (refer to FIGS. 60 and 62A), thecorresponding first scan signals TS10 (refer to FIG. 65) are not appliedto the first group of the first touch coils overlapped with the firstdisplay area DA1. Accordingly, the second noise NTS10 is not generated.

The electric potential of the common electrode is varied by the pixelvoltages applied to the pixels PX51 to PX5 j. The first noise NVcomgenerated by the variation in the electric potential of the commonelectrode is grounded by the first group of the first touch coils. Thefirst touch coils included in the first group serve as a noise removallayer of the second touch part TPP2 during the first period F-1. FIG. 65shows a ground path GP of the first noise NVcom.

As described above, since the first noise NVcom and the second noiseNTS10 do not exert the influence on the second touch part TPP2, thesecond touch part TPP2 may sense the touch event occurring in the firstdisplay area DA1 during the first period F-1.

Although not shown in figures, the first touch part TPP1 senses thetouch event occurring in the second display area DA2 during the firstperiod F-1. In this case, the noise is not generated in the second groupof the first touch electrodes overlapped with the second display areaDA2 and the display panel DP.

The first touch part TPP1 senses the touch event occurring in the firstdisplay area DA1 during the second period F-2 (refer to FIGS. 60 and62A). In this case, the noise is not generated from the second group ofthe first touch electrodes overlapped with the first display area DA1and the display panel DP. This is because the corresponding second scansignals are not applied to the first touch electrodes included in thesecond group and the pixels PX of the display panel DP, which areoverlapped with the first display area DA1, are inactivated during thesecond period F-2.

During the second period F-2, the second touch part TPP2 senses thetouch event occurring in the second display area DA2. In this case, theequivalent circuit of the display device in the second display area DA2is as shown in FIG. 65. Therefore, the noise generated from the displaypanel DP is removed, and the touch sensitivity of the second touch partTPP2 is improved.

In each frame period FRn−1, FRn, and FRn+1 (refer to FIG. 60), the firsttouch part TPP1 and the second touch part TPP2 scan the first displayarea DA1 and the second display area DA2, respectively. Accordingly, thefirst and second touch parts TPP1 and TPP2 may sense the touch eventoccurring by other input devices. In addition, the first touch part TPP1removes the noise that exerts the influence on the second touch partTPP2, and thus the touch sensitivity of the second touch part TPP2 isimproved.

FIG. 66 is a timing diagram showing signals applied to a display deviceaccording to exemplary embodiments of the present disclosure.Hereinafter, a driving method of the display device will be describedwith reference to FIG. 66.

Referring to FIG. 66, the frame periods FRn−1, FRn, and FRn+1 includethe display period DSP and the non-display period BP. During thenon-display period BP, the data voltages V_(RGB) are not output, andthus the display panel DP displays a blank image during the non-displayperiod BP.

The selection signal SS has the high level during the display period DSPand has the low level during the non-display period BP. Responsive tothe selection signal SS, the first touch part TPP1 (refer to FIG. 59A)and the second touch part TPP2 (refer to FIG. 59B) are turned on or offin different periods.

The first touch part TPP1 is operated during the display period DSP. Thefirst touch part TPP1 that senses the touch event in the magnetic fieldinduction mode is not influenced by the variation in electric potentialof the common electrode, which is caused by displaying the image. Thus,the first touch part TPP1 may sense the touch event during the displayperiod DSP without being influenced by the noise generated in thedisplay panel. In some cases, the first touch part TPP1 may be operatednot only in the mutual scanning mode but also in a self-scanning mode.

Different from that shown in FIG. 66, the first scan signal output part410T2 may output the first scan signals TS10(1) to TS10(p) multipletimes, e.g., two times, during the display period DSP. Since the firstand second display areas DA1 and DA2 are scanned multiple times duringthe display period DSP, the touch sensitivity may be improved.

The second touch part TPP2 is operated during the non-display period BP.Since the data voltages V_(RGB) are not applied to the pixels during thenon-display period BP, the noise is not generated from the display panelDP. In addition, since the first touch part TPP1 is not operated duringthe non-display period BP, the noise is not generated from the firsttouch part TPP1. Thus, the touch sensitivity of the second touch partTPP2 is improved during the non-display period BP.

FIGS. 67 to 69 are cross-sectional views showing display devicesaccording to exemplary embodiments of the present disclosure.Hereinafter, the display devices will be described with reference toFIGS. 67 to 69. In FIGS. 67 to 69, the same reference numerals denotethe same elements in FIG. 55 to FIG. 66, and thus detailed descriptionsof the same elements will be omitted.

Referring to FIG. 67, the first display substrate DS1 is disposed on theliquid crystal layer LCL and the second display substrate DS2 isdisposed under the liquid crystal layer LCL. The touch panel TP10 isdisposed on the first display substrate DS1. The touch panel TP10includes the first touch part TPP1, the insulating layer IL, the secondtouch part TPP2, and the touch substrate TSS, which corresponds to thesecond touch substrate TSS2 shown in FIG. 57.

The first touch part TPP1 is directly disposed on the upper surface ofthe first display substrate DS1. Different from the touch panel TP shownin FIG. 57, which is attached to the display panel DP after beingseparately manufactured, the touch panel TP10 is directly manufacturedon the upper surface of the first display substrate DS1. After the firsttouch part TPP1 is formed on the upper surface of the first displaysubstrate DS1, the insulating layer IL, the second touch part TPP2, andthe touch substrate TSS are sequentially stacked.

Referring to FIG. 68, the first display substrate DS1 is disposed on theliquid crystal layer LCL, and the second display substrate DS2 isdisposed under the liquid crystal layer LCL. The touch panel TP20includes the first touch part TPP1, the second touch part TPP2, and thetouch substrate TSS, which corresponds to the second touch substrateTSS2 shown in FIG. 57.

The first touch part TPP1 is disposed on the lower surface of the firstbase substrate SUB1. The insulating layer 5 is disposed under the firsttouch part TPP1. The pixels PX are disposed under the insulating layer5. In some cases, the insulating layer 5 may be replaced with the blackmatrix BM and the color filters CF.

The second touch part TPP2 is disposed on the upper surface of the firstbase substrate SUB1. The first base substrate SUB1 serves as aninsulating layer to electrically isolate the first touch part TPP1 andthe second touch part TPP2.

The touch substrate TSS is disposed on the second touch part TPP2. Thetouch panel TP20 may further include an insulating layer disposedbetween the second touch part TPP2 and the first base substrate SUB1 orbetween the second touch part TPP2 and the touch substrate TSS.

Referring to FIG. 69, the first display substrate DS1 is disposed on theliquid crystal layer LCL, and the second display substrate DS2 isdisposed under the liquid crystal layer LCL. The first display substrateDS1 includes the first base substrate SUB1, the insulating layers 10 and20, and pixels PX. The second display substrate DS2 includes the secondbase substrate SUB2, the black matrix BM, and the color filters CF.

The touch panel TP30 includes the first touch part TPP1, the insulatinglayer IL, and the second touch part TPP2. The first touch part TPP1, theinsulating layer IL, and the second touch part TPP2 are disposed on thelower surface of the first base substrate SUB1.

The second touch part TPP2 is disposed on the lower surface of the firstbase substrate SUB1 and the insulating layer IL is disposed under thesecond touch part TPP2. The first touch part TPP1 is disposed under theinsulating layer IL. The insulating layer 5 is additionally disposedunder the first touch part TPP1. The pixels PX are disposed on theinsulating layer 5.

Although the exemplary embodiments of the present disclosure have beendescribed, it will be apparent to those skilled in the art that variousmodifications and variations can be made in the present disclosurewithout departing from the spirit or scope of the disclosed subjectmatter. Thus, it is intended that the present disclosure cover themodifications and variations of the disclosed subject matter providedthey come within the scope of the appended claims and their equivalents.

What is claimed is:
 1. A display device, comprising: a display panelcomprising a first display substrate and a second display substratefacing the first display substrate, the first display substratecomprising: a first base substrate; a black matrix disposed on the firstbase substrate and comprising a plurality of openings; and a pluralityof color filters disposed in the openings, respectively; scan linegroups, each scan line group comprising a first scan line sub-group, asecond scan line sub-group connected to the first scan line sub-group,and a third scan line sub-group disposed between the first scan linesub-group and the second scan line sub-group; source line groups, eachsource line group comprising a first source line sub-group, a secondsource line sub-group connected to the first source line sub-group, anda third source line sub-group disposed between the first source linesub-group and the second source line sub-group; is a first driverconfigured to provide first scan signals to the scan line groups in afirst mode and to provide second scan signals to the scan line groups ina second mode, a magnetic field being induced by a current path formedby the first scan line sub-group and the second scan line sub-group; asecond driver configured to provide first sensing signals correspondingto a variation in a capacitance from the source line groups in the firstmode, and to provide second sensing signals according to a resonantfrequency associated with an input device, the second sensing signalsbeing provided from the source line groups in the second mode; and atouch sensor configured to receive the first sensing signals and thesecond sensing signals and to determine coordinate information of aninput position based on the first sensing signals and the second sensingsignals, wherein the scan line groups and the source line groups aredisposed on the first display substrate or the second display substrate,and wherein the scan line groups and the source line groups are disposedto overlap with the black matrix.
 2. The display device of claim 1,wherein: the scan line groups and the source line groups are disposed onone of an upper side and a lower side of the first base substrate; andan insulating layer is disposed between the first base substrate and thescan line groups and between the first base substrate and the sourceline groups.
 3. The display device of claim 1, wherein: each of thefirst scan line sub-group, the second scan line sub-group, and the thirdscan line sub-group comprises a plurality of scan lines arranged in afirst direction to be spaced apart from each other, and each of thefirst source line sub-group, the second source line sub-group, and thethird source line sub-group comprises a plurality of source linesarranged in a second direction crossing the first direction to be spacedapart from each other; and each of the scan lines further comprisesfirst sensing electrodes respectively disposed at crossing points atwhich each scan line crosses the source lines, and each of the sourcelines further comprises second sensing electrodes respectively disposedat the crossing points.
 4. A display device, comprising: a display panelcomprising a first display substrate and a second display substratefacing the first display substrate; scan line groups, each scan linegroup comprising a first scan line sub-group, a second scan linesub-group, and a third scan line sub-group disposed between the firstscan line sub-group and the second scan line sub-group; source linegroups, each source line group comprising a first source line sub-group,a second source line sub-group, and a third source line sub-groupdisposed between the first source line sub-group and the second sourceline sub-group; a first driver configured to provide first scan signalsto the scan line groups in a first mode and to provide second scansignals to the first scan line sub-group and the second scan linesub-group of the scan line groups in a second mode, a magnetic fieldbeing induced by currents flowing through the first scan line sub-groupand the second scan line sub-group in opposite directions to each other;is a second driver configured to provide a first sensing signalcorresponding to a variation in a capacitance from the source linegroups in the first mode, and to provide, from the source line groups inthe second mode, a second sensing signal according to a resonantfrequency associated with an input device; and a touch sensor configuredto receive the first sensing signal and the second sensing signal, andto determine coordinate information of an input position based on thefirst sensing signal and the second sensing signal.
 5. The displaydevice of claim 4, wherein the scan line groups and the source linegroups are disposed on the first display substrate or the second displaysubstrate.
 6. The display device of claim 5, wherein the scan linegroups and the source line groups are disposed on different layers fromeach other, and the scan line groups cross the source line groups. 7.The display device of claim 5, wherein the first display substratecomprises: a first base substrate; a black matrix disposed on the firstbase substrate and comprising a plurality of openings; and a pluralityof color filters disposed in the openings, respectively, and the scanline groups and the source line groups are disposed to overlap with theblack matrix.
 8. The display device of claim 7, wherein each of thefirst scan line sub-group, the second scan line sub-group, and the thirdscan line sub-group comprises a plurality of scan lines arranged in afirst direction to be spaced apart from each other, and each of thefirst source line sub-group, the second source line sub-group, and thethird source line sub-group comprises a plurality of source lines to bespaced apart from each other and arranged in a second direction crossingthe first direction.
 9. The display device of claim 4, wherein the firstdriver comprises: a first scan driver connected to first ends of thefirst scan line sub-group, the second scan line sub-group, and the thirdscan line sub-group; and a second scan driver connected to second endsof the first scan line sub-group, the second scan line sub-group, andthe third scan line sub-group, the first ends being different than therespective second ends.
 10. The display device of claim 9, wherein thefirst scan driver is configured to provide the first scan signals to thefirst ends of the first scan line sub-group, the second scan linesub-group, and the third scan line sub-group in the first mode, toprovide the second scan signals to the first ends of the first scan linesub-group in the second mode, and to ground the second scan linesub-group in the second mode, and wherein the second scan driver isconfigured to float the second ends of the first scan line sub-group,the second scan line sub-group, and the third scan line sub-group in thefirst mode, to ground the second ends of the first scan line sub-groupin the second mode, and to apply the second scan signals to the secondends of the second scan line sub-group in the second mode.
 11. Thedisplay device of claim 10, wherein the first scan driver is configuredto float the first ends of the third scan line sub-group in the secondmode.
 12. The display device of claim 4, wherein the second drivercomprises: a first source driver connected to first ends of the firstsource line sub-group, the second source line sub-group, and the thirdsource line sub-group; and a second source driver connected to secondends of the first source line sub-group and the second source linesub-group, the first ends being different then the respective secondends.
 13. The display device of claim 12, wherein the first sourcedriver is configured to provide the first sensing signal from the firstends of the first source line sub-group, the second source linesub-group, and the third source line sub-group in the first mode, toprovide the second sensing signal from the first ends of the firstsource line sub-group in the second mode, and to ground the first endsof the second source line sub-group in the second mode, and wherein thesecond source driver is configured to float the second ends of the firstsource line sub-group, the second source line sub-group, and the thirdsource line sub-group in the first mode, to ground the second ends ofthe first source line sub-group in the second mode, and to provide thesecond sensing signal from the second ends of the second source linesub-group in the second mode.
 14. The display device of claim 13,wherein the first source driver is configured to float the first ends ofthe third source line sub-group in the second mode.
 15. A displaydevice, comprising: a display panel comprising a first area, a secondarea, and a plurality of pixels, the display panel being configured toprovide an image during a frame period; and a touch panel comprising: afirst touch part comprising first touch coils and second touch coils,the second touch coils being insulated from the first touch coils andcrossing the first touch coils; and a second touch part comprising firsttouch electrodes disposed on the first touch part and second touchelectrodes, the second touch electrodes being insulated from the firsttouch electrodes and crossing the first touch electrodes, whereincorresponding second scan signals of the second scan signals are appliedto the first touch electrodes disposed in the first area whencorresponding first scan signals of the first scan signals are appliedto the first touch coils disposed in the second area during a firstperiod of the frame period, wherein the second touch coils areconfigured to provide first sensing signals according to a resonantfrequency of an input device, and wherein the second touch electrodesare configured to provide second sensing signals according to avariation in a capacitance.
 16. The display device of claim 15, wherein,among the pixels, pixels arranged in the first area are activated duringthe first period and pixels arranged in the second area are inactivatein the second area.
 17. The display device of claim 16, wherein thedisplay panel comprises: a first substrate comprising the pixels; asecond substrate facing the first substrate; a plurality of gate linesextended in a first direction and arranged in a second directionsubstantially perpendicular to the first direction, the gate lines beingconfigured to control the pixels; and a plurality of data linesinsulated from the gate lines and crossing the gate lines, the datalines being configured to provide data voltages to the pixels.
 18. Thedisplay device of claim 17, further comprising: a gate driver configuredto sequentially provide gate signals to the gate lines during the frameperiod; and a data driver configured to provide the data voltages to thedata lines, wherein the gate driver is configured to provide the gatesignals to the gate lines disposed in the first area during the firstperiod.
 19. The display device of claim 17, wherein the first touchcoils and the first touch electrodes are extended in the first directionand arranged in the second direction, and the second touch coils and thesecond touch electrodes are extended in the second direction andarranged in the first direction.
 20. The display device of claim 17,wherein each of the pixels comprises: a thin film transistor connectedto a corresponding gate line of the gate lines and a corresponding dataline of the data lines; a common electrode configured to receive acommon voltage; and a pixel electrode configured to receive a pixelvoltage from the thin film transistor, an electric field being formedbetween the pixel electrode and the common electrode.
 21. The displaydevice of claim 15, wherein, among the first touch electrodes, firsttouch electrodes disposed in the second area are configured to receivecorresponding second scan signals of the second scan signals when thefirst touch coils disposed in the first area among the first touch coilsreceive corresponding first scan signals of the first scan signalsduring a second period following the first period of the frame period,and wherein the second touch coils provide the first sensing signalsaccording to the resonant frequency of the input device, and the secondtouch electrodes provide the second sensing signals according to thevariation in the capacitance.
 22. The display device of claim 21,wherein, among the pixels, pixels arranged in the second area areactivated during the second period.
 23. The display device of claim 15,further comprising: a first scan signal output part configured toprovide the first scan signals; a second scan signal output partconfigured to provide the second scan signals; and a touch sensorconfigured to determine coordinate information of an input position fromat least one of the first sensing signals or the second sensing signals.24. The display device of claim 23, wherein the first scan signal outputpart is configured to provide the corresponding first scan signals tothe first touch coils disposed in the second area during the firstperiod, and the second scan signal output part is configured to providethe corresponding second scan signals to the first touch electrodesdisposed in the first area during the first period.
 25. The displaydevice of claim 24, further comprising: a first signal processorconfigured to convert the first sensing signals to first digitalsignals; a second signal processor configured to convert the secondsensing signals to second digital signals; a first selector configuredto sequentially provide the first sensing signals from the second touchelectrodes to the first signal processor; a second selector configuredto sequentially provide the second sensing signals from the second touchcoils to the second signal processor; and a coordinate calculatorconfigured to calculate the coordinate information of the input positionfrom at least one of the first digital signals or the second digitalsignals.
 26. A method of driving a display device comprising a displaypanel generating an image during a frame period and a touch panelcomprising input coils, output coils, input electrodes, and outputelectrodes, the method comprising: activating pixels disposed in a firstarea of the display panel during a first period of the frame period;providing first scan signals to the input coils disposed in a secondarea adjacent to the first area; providing second scan signals to theinput electrodes disposed in the first area of the display panel; anddetermining coordinate information of an input position from at leastone of first sensing signals provided based on a resonant frequency ofan input device and output from the output coils, and a second sensingsignal provided based on a variation in a capacitance and output fromthe output electrodes.
 27. The display device of claim 26, furthercomprising: activating the pixels disposed in the second area during asecond period following the first period; providing the first scansignals to the input coils disposed in the first area; providing thesecond scan signals to the input electrodes disposed in the second area;and determining coordinate information of the input position from atleast one of the first sensing signals provided based on the resonantfrequency of the input device and output from the output coils, and thesecond sensing signal provided based on the variation in the capacitanceand the output from the output electrodes.
 28. The display device ofclaim 27, wherein the first scan signals are provided more than once tothe input coils disposed in the second area, and the second scan signalsare provided more than once to the input electrodes disposed in thefirst area.
 29. A display device, comprising: a display panel comprisinga plurality of pixels and being configured to provide an image during aframe period, the frame period comprising a display period and anon-display period; and a touch panel comprising: a first touch partcomprising first touch coils and second touch coils, the second touchcoils being insulated from the first touch coils and crossing the firsttouch coils; and a second touch part comprising first touch electrodesdisposed on the first touch part and second touch electrodes, the secondtouch electrodes being insulated from the first touch electrodes andcrossing the first touch electrodes, wherein first scan signals areprovided to the first touch coils during the display period, second scansignals are provided to the first touch electrodes during thenon-display period, and wherein the second touch coils are configured toprovide first sensing signals according to a resonant frequency of aninput device, and the second touch electrodes are configured to providesecond sensing signals according to a variation in a capacitance. 30.The display device of claim 29, wherein the display panel comprises: afirst substrate comprising the pixels; a second substrate facing thefirst substrate; a plurality of gate lines extended in a first directionand arranged in a second direction substantially perpendicular to thefirst direction, the gate lines being configured to provide gate signalsto control the pixels; and a plurality of data lines insulated from thegate lines and crossing the gate lines, the data lines being configuredto apply data voltages to the pixels.
 31. The display device of claim30, further comprising: a gate driver configured to sequentially providethe gate signals to the gate lines during the display period; and a datadriver configured to provide the data voltages to the data lines. 32.The display device of claim 29, further comprising: a first scan signaloutput part configured to provide the first scan signals; a second scansignal output part configured to provide the second scan signals; and atouch sensor configured to determine coordinate information of an inputposition from at least one of the first sensing signals or the secondsensing signals.
 33. The display device of claim 32, wherein the displayperiod is longer than the non-display period, and the first scan signaloutput part is configured to provide the first scan signals more thanonce to the first touch coils during the display period.